Document:

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April 6, 2000                                                    Exhibit 10.75

Mr. Gary L. Smith
Chief Operating Officer
Aspect Communications
San Jose, CA  95131

Dear Gary:

     This letter agreement (the "Agreement") is to confirm the terms of your
ongoing employment with Aspect Communications Corporation (the "Company") and
supersedes and replaces all prior oral and/or written agreements regarding the
subject matter hereof between you and the Company.

     1.   This Agreement will commence on the date hereof and continue until
February 28, 2002 (the "Original Term"), unless extended for one or more
                        -------------
additional one-year terms upon mutual written agreement between you and the
Company or unless terminated pursuant to the terms described herein.  Approval
by the Company shall be evidenced by the adoption of resolutions by the
Compensation Committee of the Board of Directors of the Company (the
"Committee").  In the event that the Company has entered into discussions with a
 ---------
third party regarding a Change of Control in the beneficial ownership of the
Company (as defined below) and such Change of Control discussions are ongoing at
the end of the Original Term or any extension, this Agreement automatically
shall be extended until the later of (a) the end of a period of eighteen (18)
months following the closing of such Change of Control transaction or (b) at the
time that the parties have ceased their discussions.

     2.   You are employed as Chief Operating Officer of the Company, and as
such report to the Company's CEO/President.  Your job duties and
responsibilities are described on Exhibit A attached hereto.  You agree to the
                                  ---------
best of your ability and experience that you will, to the reasonable
satisfaction of the Company and its Board, at all times loyally and
conscientiously perform all of the duties and obligations required of you
pursuant to the terms of this Agreement; provided, however, that you shall not
be precluded from engaging in civic, charitable or religious activities, from
devoting a reasonable amount of time to private investments, or from serving on
the boards of directors of other business entities with the prior written
approval of the Board of Directors of the Company (the "Board"), so long as such
activities or service do not interfere with your responsibilities to the Company
hereunder.  You will comply with and be bound by the Company's operating
policies, procedures and practices in effect from time to time during the term
of your employment.
<PAGE>

     3.   You acknowledge that your employment is and will continue to be at-
will, as defined under applicable law, and that your employment with the Company
may be terminated by either party at any time for any or no reason, with or
without cause, and with or without notice.  If your employment terminates for
any reason, you will not be entitled to any payments, benefits, damages, award
or compensation other than as provided in this Agreement.  Notwithstanding the
foregoing, you still shall have the right to receive (i) payment of regular
monthly salary and any bonus that has accrued but is unpaid on the date of
termination, (ii) payment of all of your accrued and unused vacation through the
date of termination, (iii) following your submission of proper expense reports,
reimbursement by the Company for all expenses reasonably and necessarily
incurred by you in connection with the business of the Company prior to
termination, (iv) vested contributions and earnings from the Company's 401(k)
plan, and (v) your rights under any of the Company's employee benefit plans,
policies or arrangements in accordance with the terms of such plans, policies
and arrangements.  Any payments described in this paragraph shall be made
promptly upon termination, but in any event in compliance with applicable law
and any applicable terms of the Company's plans, policies, and arrangements.
The rights and duties created by this paragraph may not be modified in any way
except by a written agreement executed by you and the Chief Executive Officer on
behalf of the Company.

     4.   If your employment is involuntarily terminated other than for Cause
(as defined below) or terminated by you following a Constructive Termination (as
defined below) at any time upon or within twelve (12) months following a Change
of Control (the "Coverage Period"), you will be entitled to receive payment of
severance benefits equal to 24 months of your regular monthly salary plus your
annual target bonus (subject to any applicable tax withholding) in effect on the
date of your termination or upon the occurrence of the Change of Control,
whichever is greater. (Effective January 1, 2001, the Coverage Period shall be
expanded to include the period beginning three (3) months prior to the
occurrence of a Change of Control and ending thirteen (13) months following a
Change of Control.) Payment will be made in a lump sum not more than thirty (30)
days following the date of termination. Provided that you make a timely election
to continue coverage under the Company's group health plans pursuant to the
Consolidated Omnibus Budget Reconciliation Act of 1985 ("COBRA"), health
insurance benefits with the same coverage provided to you prior to the
termination (e.g. medical, dental, optical, mental health) will be provided at
the Company's cost for eighteen (18) months following the termination date, but
not longer than until you are covered by comparable health insurance benefits
from another employer or are otherwise ineligible for COBRA continuation
coverage. Nothing in this Section 4 shall restrict the ability of the Company or
its successor from changing some or all of the terms of such health insurance
benefits, the cost to participants, or other features of such benefits;
provided, however, that all similarly situated participants are treated the
same. In addition, and except as otherwise determined below, each stock option
and share of restricted stock you hold that is not otherwise fully exercisable
and/or vested (i.e., released from the Company's repurchase option) as of the
termination date shall become immediately exercisable and/or vested in full as
of such date.

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<PAGE>

          Notwithstanding the foregoing, you shall not be required to mitigate
the amount of any payment provided for in this Agreement by seeking other
employment or otherwise nor, except for your eligibility for COBRA continuation
coverage, shall the amount of any payment or benefit provided for in this
paragraph be reduced or otherwise affected by any compensation or benefits
received by you as a result of employment by another employer or self-
employment, by any retirement benefits regardless of source, by offset against
any amount claimed to be owed by you to the Company, or otherwise.

     5.   In the event that the severance and other benefits provided to you by
this Agreement (i) constitute "parachute payments" within the meaning of Section
280G of the Internal Revenue Code of 1986, as amended (the "Code"), or any
                                                            ----
comparable successor provisions, and (ii) but for this paragraph would be
subject to the excise tax imposed by Section 4999 of the Code,  or any
comparable successor provisions (the "Excise Tax"), then your benefits hereunder
shall be either

                         (i)   provided to you in full, or

                         (ii)  provided to you as to such lesser extent which
                               would result in no portion of such benefits being
                               subject to the Excise Tax,

whichever of the foregoing amounts, when taking into account applicable federal,
state, local and foreign income and employment taxes, the Excise Tax, and any
other applicable taxes, results in the receipt by you, on an after-tax basis, of
the greatest amount of benefits, notwithstanding that all or some portion of
such benefits may be taxable under the Excise Tax.  Unless the Company and you
agree otherwise in writing, any determination required under this paragraph
shall be made in writing in good faith by a qualified third party (the
"Professional Service Firm").  In the event of a reduction of benefits
 -------------------------
hereunder, you shall be given the choice of which benefits to reduce, in the
event that the reduction to zero dollars ($0) of all benefits paid in cash is
insufficient to avoid liability under the Excise Tax.  For purposes of making
the calculations required by this paragraph, the Professional Service Firm may
make reasonable assumptions and approximations concerning applicable taxes and
may rely on reasonable, good faith interpretations concerning the application of
the Code, and other applicable legal authority.  The Company and you shall
furnish to the Professional Service Firm such information and documents as the
Professional Service Firm may reasonably request in order to make a
determination under this Section 5.  The Company shall bear all costs the
Professional Service Firm may reasonably incur in connection with any
calculations contemplated by this paragraph.

          If, notwithstanding any reduction described in this paragraph, the
Internal Revenue Service ("IRS") determines that you are liable for the Excise
                           ---
Tax as a result of the receipt of the payment of benefits described above, then
you shall be obligated to pay back to the Company, within thirty (30) days after
a final IRS determination or in the event that you challenge the final IRS
determination, a final judicial determination, a portion of the payment equal to
the "Repayment Amount."  The Repayment Amount with respect to the payment of
benefits shall be the smallest amount, if any, as shall be required to be paid
to the Company so that your net after-tax proceeds with respect to any payment
of benefits (after taking into account the payment of the Excise Tax and all
other applicable taxes imposed on such payment) shall be maximized.  The
Repayment Amount with respect to the payment of benefits shall be zero if a
Repayment Amount of more than zero would not result in your net

3
<PAGE>

after-tax proceeds with respect to the payment of such benefits being maximized.
If the Excise Tax is not eliminated pursuant to this paragraph, you shall pay
the Excise Tax.

          Notwithstanding any other provision of this paragraph, if (i) there is
a reduction in the payment of benefits as described in this paragraph, (ii) the
IRS later determines that you are liable for the Excise Tax, the payment of
which would result in the maximization of your net after-tax proceeds
(calculated as if your benefits previously had not been reduced), and (iii) you
pay the Excise Tax, then the Company shall pay to you those benefits which were
reduced pursuant to this paragraph contemporaneously or as soon as
administratively possible after you pay the Excise Tax so that your net after-
tax proceeds with respect to the payment of benefits is maximized.

     6.   For purposes of this Agreement, the following definitions will apply:

          (a)  "Cause" for your termination will exist if the Company terminates
                -----
your employment for any of the following reasons: (i) you willfully fail to
substantially perform your duties hereunder (other than any such failure due to
your physical or mental illness), and such willful failure is not remedied
within ten (10) business days after written notice from the Company's Chief
Executive Officer, which written notice shall state that failure to remedy such
conduct may result in an involuntary termination for Cause; (ii) you engage in
willful and serious misconduct (including, but not limited to, an act of fraud
or embezzlement) that has caused or is reasonably expected to result in material
injury to the Company or any of its affiliates, (iii) you are convicted of or
enter a plea of guilty or nolo contendere to a crime that constitutes a felony
related to your employment with the Company or which materially adversely
affects your ability to perform your duties on behalf of the Company, or (iv)
you willfully breach any of your obligations hereunder or under any other
written agreement or covenant with the Company or any of its affiliates,
including, but not limited to, the Confidentiality Agreement, and such willful
breach is not remedied within ten (10) business days after written notice from
the Company's Chief Executive Officer, which written notice shall state that
failure to remedy such conduct may result in an involuntary termination for
Cause.

          (b)  "Change of Control" will mean (i) a dissolution or liquidation of
                -----------------
the Company; (ii)  a sale, lease or other disposition of all or substantially
all of the assets of the Company so long as the Company's stockholders of record
immediately prior to such transaction will, immediately after such transaction,
hold less than fifty percent (50%) of the voting power of the acquiring entity;
(iii) an acquisition of the Company by another entity by means of any
transaction or series of related transactions (including, without limitation,
any reorganization, merger or consolidation but excluding any merger effected
exclusively for the purpose of changing the domicile of the Company), so long as
the Company's stockholders of record immediately prior to such transaction or
series of related transactions will, immediately after such transaction or
series of related transactions, hold less than fifty percent (50%) of the voting
power of the surviving or acquiring entity; or (iv) the individuals who, as of
the date of this Agreement, are members of the Board (the "Incumbent Board"),
cease for any reason to constitute at least fifty percent (50%) of the Board.
If the election, or nomination for election by the Company's stockholders, of
any new director was approved by a vote of at least fifty percent (50%) of the
Incumbent Board, such new director shall be considered as a member of the
Incumbent Board.

               Effective January 1, 2001, "Change of Control" will mean (i) a
dissolution or liquidation of the Company; (ii) a sale, lease or other
disposition of all or substantially all of the assets of the Company so long as
the Company's stockholders

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<PAGE>

immediately prior to such transaction will, immediately after such transaction,
fail to possess direct or indirect beneficial ownership of more than fifty
percent (50%) of the voting power of the acquiring entity (for purposes of this
clause 7(b)(ii), any person who acquired securities of the Company prior to the
occurrence of such asset transaction in contemplation of such transaction and
who after such transaction possesses direct or indirect ownership of at least
ten percent (10%) of the securities of the acquiring entity immediately
following such transaction shall not be included in the group of stockholders of
the Company immediately prior to such transaction); (iii) either a merger or
consolidation in which the Company is not the surviving corporation and the
stockholders of the Company immediately prior to the merger or consolidation
fail to possess direct or indirect beneficial ownership of more than fifty
percent (50%) of the voting power of the securities of the surviving corporation
(or if the surviving corporation is a controlled affiliate of another entity,
then the required beneficial ownership shall be determined with respect to the
securities of that entity which controls the surviving corporation and is not
itself a controlled affiliate of any other entity) immediately following such
transaction, or a reverse merger in which the Company is the surviving
corporation and the stockholders of the Company immediately prior to the reverse
merger fail to possess direct or indirect beneficial ownership of more than
fifty percent (50%) of the securities of the Company (or if the Company is a
controlled affiliate of another entity, then the required beneficial ownership
shall be determined with respect to the securities of that entity which controls
the Company and is not itself a controlled affiliate of any other entity)
immediately following the reverse merger (for purposes of this clause 6(b)(iii),
any person who acquired securities of the Company prior to the occurrence of a
merger, reverse merger, or consolidation in contemplation of such transaction
and who after such transaction possesses direct or indirect beneficial ownership
of at least ten percent (10%) of the securities of the Company or the surviving
corporation (or if the Company or the surviving corporation is a controlled
affiliate, then of the appropriate entity as determined above) immediately
following such transaction shall not be included in the group of stockholders of
the Company immediately prior to such transaction); (iv) an acquisition by any
person, entity or group within the meaning of Section 13(d) or 14(d) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), or any
comparable successor provisions (excluding any employee benefit plan, or related
trust, sponsored or maintained by the Company or a subsidiary or other
controlled affiliate of the Company) of the beneficial ownership (within the
meaning of Rule 13d-3 promulgated under the Exchange Act, or comparable
successor rule) of securities of the Company representing at least fifty percent
(50%) of the combined voting power entitled to vote in the election of
directors; or (v) the individuals who, as of the date of this Agreement, are
members of the Board (the "Incumbent Board"), cease for any reason to constitute
at least fifty percent (50%) of the Board. If the election, or nomination for
election by the Company's stockholders, of any new director was approved by a
vote of at least fifty percent (50%) of the Incumbent Board, such new director
shall be considered as a member of the Incumbent Board.

     (c)  "Constructive Termination" will be deemed to occur if (A)(i) your
           ------------------------
duties and responsibilities as Chief Operating Officer of the Company (or a
successor corporation) are materially diminished from your duties and
responsibilities as in effect at any time from the time immediately prior to the
occurrence of a Change of Control or at any time thereafter, without your prior
written consent; (ii) any reduction in the total value of your base compensation
and benefits occurs; (iii) your new business office location is either (a) more
than thirty (30) miles in distance from your current business office location or
(b) greater than your current commute to and from your current business office
location; and (B) within sixty (60) days immediately following such event
described in clauses (i) through (iii) above, you elect to terminate your
employment voluntarily.  For purposes of this definition and this Agreement,
however, a change in title with substantially the same duties and
responsibilities

5
<PAGE>

shall not be considered a Constructive Termination, should this result solely
from an acquisition by a larger company in which you have continuing
responsibilities for the acquiror which are substantially the same as those you
had for the Company when it was independent.

     7.   You have signed a document entitled "Employee Agreement" (the
"Confidentiality Agreement") substantially in the form attached hereto as
 -------------------------
Exhibit B.  You hereby represent and warrant to the Company that you have
---------
complied with all obligations under the Confidentiality Agreement and agree to
continue to abide by the terms of the Confidentiality Agreement and further
agree that the provisions of the Confidentiality Agreement will survive any
termination of this Agreement or of your employment relationship with the
Company.

     Upon your involuntary termination of employment other than for Cause or
your voluntary termination following a Constructive Termination, and as a
condition of the receipt of any benefits under this Agreement, you shall execute
an effective release (the "Release") in substantially the form incorporated
                           -------
herein and attached hereto as Exhibit C (or if you are under forty (40) years
                              ---------
old at the time of such termination, in substantially the form attached hereto
as Exhibit C with appropriate changes to reflect the inapplicability of the Age
Discrimination in Employment Act) as shall ultimately be determined by the
Company.  Such Release shall specifically relate to all of your rights and
claims in existence at the time of such execution and shall confirm your
obligations under the Confidentiality Agreement. It is understood that you have
twenty-one (21) days to consider whether to execute such Release, and you may
revoke such Release within seven (7) business days after execution.  In the
event you do not execute such Release within the twenty-one (21) day period, or
if you revoke such Release within the subsequent seven (7) business day period,
no benefits shall be payable under this Agreement and this Agreement shall be
null and void.  Notwithstanding the foregoing, in addition to or in lieu of the
Release attached hereto as Exhibit C, you may be required to execute and deliver
an effective release in such other form as the Company may, in its sole
discretion, determine to be necessary or appropriate in order to comply with the
requirements of the laws of any jurisdiction applicable to you in order to make
a general release of claims effective and enforceable.

     9.   You represent that you have not entered into any agreements,
understandings, or arrangements with any other person or entity which would be
breached by you as a result of, or that would in any way preclude or prohibit
you from entering into this Agreement or performing any of the duties and
responsibilities provided for herein.

     10.  Any successor to the Company as a result of the occurrence of a Change
of Control (whether direct or indirect and whether by purchase, lease, merger,
consolidation, liquidation or otherwise) or otherwise which succeeds to all or
substantially all of the Company's business and/or assets shall assume the
obligations under this Agreement and agree expressly to perform the obligations
under this Agreement in the same manner and to the same extent as the Company
would be required to perform such obligations in the absence of a succession.
For all purposes under this Agreement, the term "Company" shall include any
successor to the Company's business and/or assets which executes and delivers
the assumption agreement described in this paragraph or which becomes bound by
the terms of this Agreement by operation of law.

6
<PAGE>

          The terms of this Agreement and all of your rights hereunder shall
inure to the benefit of, and be enforceable by, your personal or legal
representatives, executors, administrators, successors, heirs, distributees,
devisees or legatees.

     11.  This Agreement, including any Exhibits hereto, constitutes the sole
agreement of the parties and supersedes all negotiations and prior agreements
with respect to the subject matter hereof, i.e., the rights and responsibilities
of you and the Company in the event of certain terminations of your employment
with the Company relating to the occurrence of a Change of Control.

     12.  Any term of this Agreement may be amended or waived only with the
written consent of the parties.

     13.  Any notice required or permitted by this Agreement will be in writing
and will be deemed sufficient upon receipt, when delivered personally, by
facsimile or by a nationally-recognized delivery service (such as Federal
Express or Express Mail), or 72 hours after being deposited in the U.S. mail as
certified or registered mail with postage prepaid, if such notice is addressed
to the party to be notified at such party's address as set forth below or as
subsequently modified by written notice.

     14.  The validity, interpretation, construction and performance of this
Agreement will be governed by the laws of the State of California, without
giving effect to the principles of conflict of laws.

     15.  If one or more provisions of this Agreement are held to be
unenforceable under applicable law, the parties agree to re-negotiate such
provision in good faith.  In the event that the parties cannot reach a mutually
agreeable and enforceable replacement for such provision, then (i) such
provision will be excluded from this Agreement or a legal authority of competent
jurisdiction (including an arbitrator) will have the authority to modify or
replace the invalid or unenforceable provision with a valid and enforceable
provision that most accurately embodies the parties' intention with respect to
the invalid or unenforceable provision, (ii) the balance of the Agreement will
be interpreted as if such provision were so excluded, modified or replaced and
(iii) the balance of the Agreement will be enforceable in accordance with its
terms.

     16.  You and the Company agree to attempt to settle any disputes arising in
connection with this Agreement through good faith consultation.  In the event
that we are not able to resolve any such disputes within fifteen (15) days after
notification in writing to the other, we agree that any dispute or claim arising
out of or in connection with this Agreement will be finally settled by binding
arbitration in Santa Clara County, California in accordance with the rules of
the American Arbitration Association by one arbitrator appointed in accordance
with said rules.  The arbitrator will apply California law, without reference to
rules of conflicts of law or rules of statutory arbitration, to the resolution
of any dispute.  Judgment on the award rendered by the arbitrator may be entered
in any court having jurisdiction thereof.  Notwithstanding the foregoing, the
parties may apply to any court of competent jurisdiction for preliminary or
interim equitable relief, or to compel arbitration in accordance with this
paragraph, without breach of this arbitration provision.   You agree that
punitive damages will not be awarded.  This paragraph will not apply to the
Confidentiality Agreement.

          If there is termination of your employment with the Company followed
by a dispute as to whether you are entitled to the benefits provided under this
Agreement, then,

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<PAGE>

during the period of that dispute the Company shall pay you fifty percent (50%)
of the amount specified in Section 4 hereof (except that the Company shall pay
one hundred percent (100%) of any insurance premiums provided for in Section 4),
if, and only if, you agree in writing that if the dispute is resolved against
you, you shall promptly refund to the Company all payments you receive plus
interest at the rate provided in Section 1274(d) of the Code, compounded
quarterly. If the dispute is resolved in your favor, promptly after resolution
of the dispute the Company shall pay you the sum that was withheld during the
period of the dispute plus interest at the rate provided in Section 1274(d) of
the Code, compounded quarterly.

          Notwithstanding any other provisions of this Agreement, if you either
(i) bring any action to enforce your rights pursuant to this Agreement, or (ii)
defend any legal challenge to your rights hereunder, you shall be entitled to
recover reasonable attorneys' fees and costs incurred in connection with such
action from the Company, payable on a monthly basis, regardless of the outcome
of such action; provided, however, that in the event such action is commenced by
you, the court finds the claim was brought in good faith.

     17.  You acknowledge that, in executing this Agreement, you have had the
opportunity to seek the advice of independent legal counsel, and have read and
understood all of the terms and provisions of this Agreement.

          Please indicate your agreement with the above terms by signing below.

                              Sincerely,

                              Aspect Communications Corporation

                              /s/ Beatriz Infante
                              ---------------------------

                              Title: Chief Executive Officer and President

                              Address: 1310 Ridder Park Drive
                                       San Jose, CA 95131

                              Facsimile Number: (408) 325-2261

     My signature below signifies my agreement with the above terms.

     By:  /Gary L. Smith/

     Address:  /Address/

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                                   EXHIBIT A
                                   ---------

                           DESCRIPTION OF JOB DUTIES
                           -------------------------
                             AND RESPONSIBILITIES
                             --------------------
<PAGE>

                                   EXHIBIT B
                                   ---------

                          CONFIDENTIALITY  AGREEMENT
                          --------------------------
<PAGE>

                                   EXHIBIT C
                                   ---------

                                    RELEASE
                                    -------
<PAGE>

                                    RELEASE
                        [NOTE: INCLUDES ADEA LANGUAGE]

     Certain capitalized terms used in this Release are defined in the letter
agreement between me and the Company dated /Date/, (the "Agreement") which I
have executed and of which this Release is a part.

     I hereby confirm my obligations under the Company's Confidentiality
Agreement.

     Except as otherwise set forth in this Release, I hereby release, acquit and
forever discharge the Company, its parents and subsidiaries, and their officers,
directors, agents, servants, employees, shareholders, successors, assigns and
affiliates, of and from any and all claims, liabilities, demands, causes of
action, costs, expenses, attorneys fees, damages, indemnities and obligations of
every kind and nature, in law, equity, or otherwise, known and unknown,
suspected and unsuspected, disclosed and undisclosed (other than any claim for
indemnification I may have as a result of any third party action against me
based on my employment with the Company), arising out of or in any way related
to agreements, events, acts or conduct at any time prior to the date I execute
this Release, including, but not limited to: all such claims and demands
directly or indirectly arising out of or in any way connected with my employment
with the Company or the termination of that employment, including but not
limited to, claims of intentional and negligent infliction of emotional
distress, any and all tort claims for personal injury, claims or demands related
to salary, bonuses, commissions, stock, stock options, or any other ownership
interests in the Company, vacation pay, fringe benefits, expense reimbursements,
severance pay, or any other form of disputed compensation; claims pursuant to
any federal, state or local law or cause of action including, but not limited
to, the federal Civil Rights Act of 1964, as amended; the federal Age
Discrimination in Employment Act of 1967, as amended ("ADEA"); the federal
Employee Retirement Income Security Act of 1974, as amended; the federal
Americans with Disabilities Act of 1990; tort law; contract law; statutory law;
common law; wrongful discharge; discrimination; fraud; defamation; emotional
distress; and breach of the implied covenant of good faith and fair dealing;
provided, however, that nothing in this paragraph shall be construed in any way
to release the Company from its obligation to indemnify me pursuant to the
Company's indemnification obligation pursuant to agreement or applicable law.

     In giving this release, which includes claims that may be unknown to me at
present, I acknowledge that I have read and understand Section 1542 of the
California Civil Code which reads as follows: "A general release does not
extend to claims which the creditor does not know or suspect to exist in his
favor at the time of executing the release, which if known by him must have
materially affected his settlement with the debtor."  I expressly waive and
relinquish all rights and benefits under that section and any law of any
jurisdiction of similar effect with respect to my release of any unknown or
unsuspected claims I may have against the Company.

     I acknowledge that I am knowingly and voluntarily waiving and releasing any
rights I may have under ADEA.  I also acknowledge that the consideration given
under this Agreement for the waiver and release in the preceding paragraph
hereof is in addition to anything of value to which I was already entitled.  I
further acknowledge that I have been advised by this writing, as required by the
ADEA, that:  (A) my waiver and release do not apply to any rights or claims that
may arise on or after the date I execute this Release; (B) I have the right to
consult with an attorney prior to executing this Release; (C) I have twenty-one
(21) days to consider this Release (although I may choose to voluntarily execute
this Release earlier); (D) I have seven (7) days following the execution of this
Release by the parties to revoke the Release; and (E) this Release shall not be
effective until the date upon which the revocation period has expired, which
shall be the eighth day after this Release is executed by me.

                                   By: __________________________________

                                   Date: ________________________________<PAGE>

                            1997 STOCK OPTION PLAN
                                      OF
                                 MAXYGEN, INC.
                        (as amended as of May 25, 2000)

     1.   PURPOSES OF THE PLAN
          --------------------

     The purposes of the 1997 Stock Option Plan (the "Plan") of Maxygen, Inc., a
Delaware corporation (the "Company"), are to:

          (a) Encourage selected employees, directors and consultants to improve
operations and increase profits of the Company;

          (b) Encourage selected employees, directors and consultants to accept
or continue employment or association with the Company or its Affiliates; and

          (c) Increase the interest of selected employees, directors and
consultants in the Company's welfare through participation in the growth in
value of the common stock of the Company (the "Common Stock").

     Options granted under this Plan ("Options") may be "incentive stock
options" ("ISOs") intended to satisfy the requirements of Section 422 of the
Internal Revenue Code of 1986, as amended (the "Code"), or "nonstatutory
options" ("NSOs").

     2.   ELIGIBLE PERSONS
          ----------------

     Every person who at the date of grant of an Option is a full-time employee
of the Company or of any Affiliate (as defined below) of the Company is eligible
to receive NSOs or ISOs under this Plan.  Every person who at the date of grant
is a consultant to, or nonemployee director of, the Company or any Affiliate (as
defined below) of the Company is eligible to receive NSOs under this Plan.  The
term "Affiliate" as used in the Plan means a parent or subsidiary corporation as
defined in the applicable provisions of the Code.  The term "employee" includes
an officer or director who is an employee, of the Company.  The term
"consultant" includes persons employed by, or otherwise affiliated with, a
consultant.

     3.   STOCK SUBJECT TO THIS PLAN
          --------------------------

     Subject to the provisions of Section 6.1.1 of the Plan, the total number of
shares of stock which may be issued under options granted pursuant to this Plan
shall be 9,000,000 shares of Common Stock plus an annual increase to be added on
the first day of the Company's fiscal year beginning in fiscal year 2001, equal
to the lesser of (i) 1,500,000 shares, (ii) 4% of the outstanding shares of
capital stock on such date or (iii) an amount

                                       1
<PAGE>

determined by the Board. The shares covered by the portion of any grant under
the Plan which expire unexercised shall become available again for grants under
the Plan.

     4.   ADMINISTRATION
          --------------

          4.1  General.  This Plan shall be administered by the Board of
               -------
Directors of the Company (the "Board") or, by a committee (the "Committee") of
at least two Board members to which administration of the Plan, or of part of
the Plan, is delegated (in either case, the "Administrator").

          4.2  Public Company.  From and after such time as the Company
               --------------
registers a class of equity securities under Section 12 of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), the Committee shall
consist of Board members who are "Non-Employee Directors" as defined under Rule
16b-3 promulgated by the Securities and Exchange Commission ("Rule 16b-3"), or
any successor rule thereto.

          4.3  Authority of Administrator.  Subject to the other provisions of
               --------------------------
this Plan, the Administrator shall have the authority, in its discretion: (i) to
grant Options; (ii) to determine the fair market value of the Common Stock
subject to Options; (iii) to determine the exercise price of Options granted;
(iv) to determine the persons to whom, and the time or times at which, Options
shall be granted, and the number of shares subject to each Option; (v) to
interpret this Plan; (vi) to prescribe, amend, and rescind rules and regulations
relating to this Plan; (vii) to determine the terms and provisions of each
Option granted (which need not be identical), including but not limited to, the
time or times at which Options shall be exercisable; (viii) with the consent of
the optionee, to modify or amend any Option; (ix) to accelerate the exercise
date of any Option; (x) to authorize any person to execute on behalf of the
Company any instrument evidencing the grant of an Option; and (xi) to make all
other determinations deemed necessary or advisable for the administration of
this Plan.  The Administrator may delegate nondiscretionary administrative
duties to such employees of the Company as it deems proper.

          4.4  Interpretation by Administrator.  All questions of
               -------------------------------
interpretation, implementation, and application of this Plan shall be determined
in its absolute discretion by the Administrator.  Such determinations shall be
final and binding on all persons.

          4.5  Rule 16b-3.  With respect to persons subject to Section 16 of the
               ----------
Exchange Act, if any, transactions under this Plan are intended to comply with
the applicable conditions of Rule 16b-3, or any successor rule thereto.  To the
extent a transaction under this Plan or action by the Administrator fails to so
comply, it shall, to the extent deemed advisable by the Administrator, be
modified to comply with Rule 16b-3.  Notwithstanding the above, it shall be the
responsibility of such persons, not of the Company or the Administrator, to
comply with the requirements of Section 16 of the

                                       2
<PAGE>

Exchange Act; and neither the Company nor the Administrator shall be liable if
this Plan or any transaction under this Plan fails to comply with the applicable
conditions of Rule 16b-3 or any successor rule thereto, or if any such person
incurs any liability under Section 16 of the Exchange Act.

     5.   GRANTING OF OPTIONS; OPTION AGREEMENT
          -------------------------------------

          5.1  No Options shall be granted under this Plan after ten years from
the date of adoption of this Plan by the Board.

          5.2  Each Option shall be evidenced by a written stock option
agreement (the "Option Agreement"), in form satisfactory to the Company,
executed by the Company and the person to whom such Option is granted; provided,
however, that the failure by the Company, the optionee, or both to execute the
Option Agreement shall not invalidate the granting of an Option, although the
exercise of each option shall be subject to Section 6.1.3.

          5.3  The Option Agreement shall specify whether each Option it
evidences is an NSO or an ISO.

          5.4  Subject to Section 6.3.3 with respect to ISOs, the Administrator
may approve the grant of Options under this Plan to persons who are expected to
become employees, directors or consultants of the Company, but are not
employees, directors or consultants at the date of approval.

     6.   TERMS AND CONDITIONS OF OPTIONS
          -------------------------------

     Each Option granted under this Plan shall be subject to the terms and
conditions set forth in Section 6.1.  NSOs shall be also subject to the terms
and conditions set forth in Section 6.2, but not those set forth in Section 6.3.
ISOs shall also be subject to the terms and conditions set forth in Section 6.3,
but not those set forth in Section 6.2.

          6.1  Terms and Conditions to Which All Options Are Subject.  Options
               -----------------------------------------------------
granted under this Plan shall be subject to the following terms and conditions:

               6.1.1 Changes in Capital.  Subject to Section 6.1.2, if the stock
                     ------------------
of the Company is changed by reason of a stock split, reverse stock split, stock
dividend, or recapitalization, combination or reclassification, appropriate
adjustments shall be made by the Board in (a) the number and class of shares of
stock subject to this Plan and each Option outstanding under this Plan, and (b)
the exercise price of each outstanding Option; provided, however, that the
Company shall not be required to issue fractional shares as a result of any such
adjustments.  Each such adjustment shall be subject to approval by the Board in
its absolute discretion.

                                       3
<PAGE>

               6.1.2 Corporate Transactions.  In the event of the proposed
                     ----------------------
dissolution or liquidation of the Company, the Administrator shall notify each
optionee at least 30 days prior to such proposed action.  To the extent not
previously exercised, all Options will terminate immediately prior to the
consummation of such proposed action.  In the event of a merger or consolidation
of the Company with or into another corporation or entity in which the Company
does not survive, or in the event of a sale of all or substantially all of the
assets of the Company in which the stockholders of the Company receive
securities of the acquiring entity or an affiliate thereof, all Options shall be
assumed or equivalent options shall be substituted by the successor corporation
(or other entity) or a parent or subsidiary of such successor corporation (or
other entity).  If such successor does not agree to assume the Options or to
substitute equivalent options therefor, unless the Administrator shall determine
otherwise, the Options shall be fully exercisable for a period of 30 days form
the date notice is given under this Section 6.1.2 and shall terminate upon
expiration of such 30-day period.

               6.1.3 Time of Option Exercise.  Subject to Section 5 and Section
                     ----------------------
6.3.4, Options granted under this Plan shall be exercisable (a) immediately as
of the effective date of the Option Agreement granting the Option, or (b) in
accordance with a schedule related to the date of the grant of the Option, the
date of first employment, or such other date as may be set by the Administrator
(in any case, the "Vesting Base Date") and specified in the Option Agreement
relating to such Option; provided, however, that the right to exercise an Option
must vest at the rate of at least 20% per year over five years from the date the
option was granted.  Options granted to officers, directors or consultants may
become fully exercisable, subject to reasonable conditions such as continued
employment, at any time or during any period established by the Board of the
Administrator in accordance with this Plan.  In any case, no Option shall be
exercisable until a written Option Agreement in form satisfactory to the Company
is executed by the Company and the optionee.

               6.1.4 Option Grant Date.  Except in the case of advance approvals
                     -----------------
described in Section 5.4, the date of grant of an Option under this Plan shall
be the date as of which the Administrator approves the grant.

               6.1.5 Nonassignability of Option Rights. Except as otherwise
                     ---------------------------------
determined by the Administrator and expressly set forth in the Option Agreement,
no Option granted under this Plan shall be assignable or otherwise transferable
by the optionee except by will or by the laws of descent and distribution.
During the life of the optionee, except as otherwise determined by the
Administrator and expressly set forth in the Option Agreement, an Option shall
be exercisable only by the optionee.

               6.1.6 Payment.  Except as provided below, payment in full, in
                     -------
cash, shall be made for all stock purchased at the time written notice of
exercise of an Option is

                                       4
<PAGE>

given to the Company, and proceeds of any payment shall constitute general funds
of the Company. At the time an Option is granted or exercised, the
Administrator, in the exercise of its absolute discretion after considering any
tax or accounting consequences, may authorize any one or more of the following
additional methods of payment:

                     (a) Acceptance of the optionee's full recourse promissory
note for all or part of the Option price, payable on such terms and bearing such
interest rate as determined by the Administrator (but in no event less than the
minimum interest rate specified under the Code at which no additional interest
would be imputed and in no event more than the maximum interest rate allowed
under applicable usury laws), which promissory note may be either secured or
unsecured in such manner as the Administrator shall approve (including, without
limitation, by a security interest in the shares of the Company); and

                     (b) Delivery by the optionee of Common Stock already owned
by the optionee for all or part of the Option price, provided the value
(determined as set forth in Section 6.1.11) of such Common Stock is equal on the
date of exercise to the Option price, or such portion thereof as the optionee is
authorized to pay by delivery of such stock; provided, however, that if an
optionee has exercised any portion of any Option granted by the Company by
delivery of Common Stock, the optionee may not, within six months following such
exercise, exercise any Option granted under this Plan by delivery of Common
Stock without the consent of the Administrator.

               6.1.7 Termination of Employment.
                     -------------------------

                     (a) If, for any reason other than death, disability or
"cause" (as defined below), an optionee ceases to be employed by the Company or
any of its Affiliates (such event being called a "Termination"), Options held at
the date of Termination (to the extent then exercisable) may be exercised in
whole or in part at any time within 90 days of the date of such Termination, or
such other period of not less than 30 days after the date of such Termination as
is specified in the Option Agreement (but in no event after the Expiration
Date).

                     (b) If an optionee dies or becomes disabled (within the
meaning of Section 22(c)(3) of the Code) while employed by the Company or an
Affiliate or within the period that the Option remains exercisable after
Termination, Options then held (to the extent then exercisable) may be
exercised, in whole or in part, by the optionee, by the optionee's personal
representative or by the person to whom the Option is transferred by devise or
the laws of descent and distribution, at any time within 12 months after the
death or 12 months after the disability of the optionee, or such other period of
not less than six months from the date of Termination as is specified in the
Option Agreement (but in no event after the Expiration Date).

                                       5
<PAGE>

                     (c) If an optionee is terminated for "cause," all Options
then held shall terminate and no longer be exercisable as of the date of
Termination.

                     (d) For purposes of this Section 6.1.7, "employment"
includes service as a director or as a consultant.

                     (e) For purposes of this Section 6.1.7, an optionee's
employment shall not be deemed to terminate by reason of sick leave, military
leave or other leave of absence approved by the Administrator, if the period of
any such leave does not exceed 90 days or, if longer, if the optionee's right to
reemployment by the Company or any Affiliate is guaranteed either contractually
or by statute.

                     (f) For purposes of this Section 6.1.7, "cause" shall mean
Termination (i) by reason of optionee's commission of a felony, misdemeanor or
other illegal conduct involving dishonesty, fraud or other matters of moral
turpitude, (ii) by reason of optionee's dishonesty towards, fraud upon, or
deliberate injury or attempted injury to the Company or any of its Affiliates,
or (iii) by reason of optionee's willfully engaging in misconduct which is
materially and demonstrably injurious to the Company or any of its Affiliates.

               6.1.8 Repurchase of Stock.  At the option of the Administrator,
                     -------------------
the stock to be delivered pursuant to the exercise of any Option granted to an
employee, director or consultant under this Plan may be subject to a right of
repurchase in favor of the Company with respect to any employee, or director or
consultant whose employment, or director or consulting relationship with the
Company is terminated.  Such right of repurchase shall be exercisable as the
Administrator may determine in the grant of option, either:

                     (a) at the Option exercise price and (i) shall lapse at the
rate of at least 20% per year over five years from the date the Option is
granted (without regard to the date it was exercised or becomes exercisable),
and must be exercised for cash or cancellation of purchase money indebtedness
within 90 days after such termination of employment (or in the case of
securities issued upon exercise of options after the date of termination, within
90 days after the date of the exercise); or

                     (b) at the higher of the Option exercise price or the value
(determined as set forth in Section 6.1.11) of the stock being repurchased on
the date of termination, and must be exercised for cash or cancellation of
purchase money indebtedness within 90 days of termination of employment (or in
the case of securities issued upon exercise of options after the date of
termination, within 90 days after the date of exercise), and such right shall
terminate when the Company's securities become publicly traded.

                                       6
<PAGE>

     In addition to the restrictions set forth in subparagraphs (a) and (b)
above, the shares held by an officer, director or consultant of the issuer or an
affiliate of the issuer may be subject to additional or greater restrictions, at
the absolute discretion of the Administrator.

               6.1.9  Withholding and Employment Taxes.  At the time of exercise
                      --------------------------------
of an Option or at such other time as the amount of such obligations becomes
determinable (the "Tax Date"), the optionee shall remit to the Company in cash
all applicable federal and state withholding and employment taxes.  If
authorized by the Administrator in its absolute discretion, after considering
any tax or accounting consequences, an optionee may elect to (i) deliver a full
recourse promissory note on such terms as the Administrator deems appropriate,
(ii) tender to the Company previously owned shares of Stock or other securities
of the Company, or (iii) have shares of Common Stock which are acquired upon
exercise of the Option withheld by the Company to pay some or all of the amount
of tax that is required by law to be withheld by the Company as a result of the
exercise of such Option.  Any election pursuant to clause (ii) above, where the
optionee is tendering Common Stock issued pursuant to the exercise of an Option,
shall require that such shares have been held at least six months prior to the
Tax Date.  Any securities tendered or withheld in accordance with this Section
6.1.9 shall be valued by the Company as of the Tax Date.

               6.1.10 Other Provisions.  Each Option granted under this Plan may
                      ----------------
contain such other terms, provisions, and conditions not inconsistent with this
Plan as may be determined by the Administrator, and each ISO granted under this
Plan shall include such provisions and conditions as are necessary to qualify
the Option as an "incentive stock option" within the meaning of Section 422 of
the Code.  If Options provide for a right of first refusal in favor of the
Company with respect to stock acquired by employees, directors or consultants,
such Options shall provide that the right of first refusal shall terminate upon
the earlier of (i) the closing of the Company's initial registered public
offering to the public generally, or (ii) the date ten years after the grant
date as set forth in Section 6.1.4.

               6.1.11 Determination of Value. For purposes of the Plan, the
                      ----------------------
value of Common Stock or other securities of the Company shall be determined as
follows:

                     (a) If the stock of the Company is listed on any
established stock exchange or a national market system, including without
limitation the National Market System of the National Association of Securities
Dealers, Inc. Automated Quotation System, its fair market value shall be the
closing sales price for such stock or the closing bid if no sales were reported,
as quoted on such system or exchange (or the largest such exchange) for the date
the value is to be determined (or if there are no sales

                                       7
<PAGE>

for such date, then for the last preceding business day on which there were
sales), as reported in the Wall Street Journal or similar publication.
                           -------------------

                     (b) If the stock of the Company is regularly quoted by a
recognized securities dealer but selling prices are not reported, its fair
market value shall be the mean between the high bid and low asked prices for the
stock on the date the value is to be determined (or if there are no quoted
prices for the date of grant, then for the last preceding business day on which
there were quoted prices).

                     (c) In the absence of an established market for the stock,
the fair market value thereof shall be determined in good faith by the
Administrator, by consideration of such factors as the Administrator in its
discretion deems appropriate among the recent issue price of other securities of
the Company, the Company's net worth, prospective earning power, dividend-paying
capacity, and other relevant factors, including the goodwill of the Company, the
economic outlook in the Company's industry, the Company's position in the
industry and its management, and the values of stock of other corporations in
the same or a similar line of business.

               6.1.12 Option Term.  Subject to Section 6.3.5, no Option shall be
                      -----------
exercisable more than ten years after the date of grant, or such lesser period
of time as is set forth in the stock option agreement (the end of the maximum
exercise period stated in the Option Agreement is referred to in this Plan as
the "Expiration Date").

               6.1.13 Exercise Price. The exercise price of any Option granted
                      --------------
to any person who owns, directly or by attribution under the Code currently
Section 424(d), stock possessing more than ten percent of the total combined
voting power of all classes of stock of the Company or of any Affiliate (a "Ten
Percent Stockholder") shall in no event be less than 110% of the fair market
value (determined in accordance with Section 6.1.11) of the stock covered by the
Option at the time the Option is granted.

          6.2  Terms and Conditions to Which Only NSOs Are Subject.  Except as
               ---------------------------------------------------
set forth in Section 6.1.13, the exercise price of a NSO shall be not less than
85% of the fair market value (determined in accordance with Section 6.1.11) of
the stock subject to the Option on the date of grant.

          6.3  Terms and Conditions to Which Only ISOs Are Subject. Options
               ---------------------------------------------------
granted under this Plan which are designated as ISOs shall be subject to the
following terms and conditions:

               6.3.1  Exercise Price.  Except as set forth in Section 6.1.13,
                      --------------
the exercise price of an ISO shall be determined in accordance with the
applicable provisions of the Code and shall in no event be less than the fair
market value (determined in

                                       8
<PAGE>

accordance with Section 6.1.11) of the stock covered by the Option at the time
the Option is granted.

               6.3.2  Disqualifying Dispositions.  If stock acquired by exercise
                      --------------------------
of an ISO granted pursuant to this Plan is disposed of in a "disqualifying
disposition" within the meaning of Section 422 of the Code, the holder of the
stock immediately before the disposition shall promptly notify the Company in
writing of the date and terms of the disposition and shall provide such other
information regarding the Option as the Company may reasonably require.

               6.3.3  Grant Date.  If an ISO is granted in anticipation of
                      ----------
employment as provided in Section 5.4, the Option shall be deemed granted,
without further approval, on the date the grantee assumes the employment
relationship forming the basis for such grant, and, in addition, satisfies all
requirements of this Plan for Options granted on that date.

               6.3.4  Vesting. Notwithstanding any other provision of this Plan,
                      -------
ISOs granted under all incentive stock option plans of the Company and its
subsidiaries may not "vest" for more than $100,000 in fair market value of stock
(measured on the grant dates(s)) in any calendar year. For purposes of the
preceding sentence, an option "vests" when it first becomes exercisable. If, by
their terms, such ISOs taken together would vest to a greater extent in a
calendar year, and unless otherwise provided by the Administrator, ISOs with
lower exercise prices shall vest before ISOs with higher exercise prices,
regardless of the grant date.

               6.3.5  Term. Notwithstanding Section 6.1.12, no ISO granted to
                      ----
any Ten Percent Stockholder shall be exercisable more than five years after the
date of grant.

     7.   MANNER OF EXERCISE
          ------------------

          7.1  An optionee wishing to exercise an Option shall give written
notice to the Company at its principal executive office, to the attention of the
officer of the Company designated by the Administrator, accompanied by payment
of the exercise price as provided in Section 6.1.6.  The date the Company
receives written notice of an exercise hereunder accompanied by payment of the
exercise price will be considered as the date such Option was exercised.

          7.2  Promptly after receipt of written notice of exercise of an
Option, the Company shall, without stock issue or transfer taxes to the optionee
or other person entitled to exercise the Option, deliver to the optionee or such
other person a certificate or certificates for the requisite number of shares of
stock.  An optionee or permitted transferee of an optionee shall not have any
privileges as a stockholder with respect to any shares of stock covered by the
Option until the date of issuance (as evidenced by the

                                       9
<PAGE>

appropriate entry on the books of the Company or a duly authorized transfer
agent) of such shares.

     8.   EMPLOYMENT OR CONSULTING RELATIONSHIP
          -------------------------------------

     Nothing in this Plan or any Option granted thereunder shall interfere with
or limit in any way the right of the Company or of any of its Affiliates to
terminate any optionee's employment or consulting at any time, nor confer upon
any optionee any right to continue in the employ of, or consult with, the
Company or any of its Affiliates.

     9.   FINANCIAL INFORMATION
          ---------------------

     The Company shall provide to each optionee during the period such optionee
holds an outstanding Option, and to each holder of Common Stock acquired upon
exercise of Options granted under the Plan for so long as such person is a
holder of such Common Stock, annual financial statements of the Company as
prepared either by the Company or independent certified public accountants of
the Company.  Such financial statements shall include, at a minimum, a balance
sheet and an income statement, and shall be delivered as soon as practicable
following the end of the Company's fiscal year.

     10.  CONDITIONS UPON ISSUANCE OF SHARES
          ----------------------------------

     Shares of Common Stock shall not be issued pursuant to the exercise of an
Option unless the exercise of such Option and the issuance and delivery of such
shares pursuant thereto shall comply with all relevant provisions of law,
including, without limitation, the Securities Act of 1933, as amended (the
"Securities Act").

     11.  NONEXCLUSIVITY OF THE PLAN
          --------------------------

     The adoption of the Plan shall not be construed as creating any limitations
on the power of the Company to adopt such other incentive arrangements as it may
deem desirable, including, without limitation, the granting of stock options
other than under the Plan.

     12.  MARKET STANDOFF
          ---------------

     Each Optionee, if so requested by the Company or any representative of the
underwriters in connection with any registration of the offering of any
securities of the Company under the Securities Act of 1933, as amended (the
"Securities Act"), shall not sell or otherwise transfer any shares of Common
Stock acquired upon exercise of Options during the 180-day period following the
effective date of a registration statement of the company filed under the
Securities Act; provided, however, that such restriction shall apply only to the
first two registration statements of the Company to become effective

                                       10
<PAGE>

under the Securities Act which includes securities to be sold on behalf of the
Company to the public in an underwritten public offering under the Securities
Act. The Company may impose stop-transfer instructions with respect to
securities subject to the foregoing restriction until the end of such 180-day
period.

     13.  AMENDMENTS TO PLAN
          ------------------

     The Board may at any time amend, alter, suspend or discontinue this Plan.
Without the consent of an optionee, no amendment, alteration, suspension or
discontinuance may adversely affect outstanding Options except to conform this
Plan and ISOs granted under this Plan to the requirements of federal or other
tax laws relating to incentive stock options.  No amendment, alteration,
suspension or discontinuance shall require stockholder approval unless (a)
stockholder approval is required to preserve incentive stock option treatment
for federal income tax purposes, or (b) the Board otherwise concludes that
stockholder approval is advisable.

     14.  EFFECTIVE DATE OF PLAN
          ----------------------

     This Plan shall become effective upon adoption by the Board provided,
however, that no Option shall be exercisable unless and until written consent of
the stockholders of the Company, or approval of stockholders of the Company
voting at a validly called stockholders' meeting, is obtained within 12 months
after adoption by the Board. If such stockholder approval is not obtained within
such time, Options granted hereunder shall terminate and be of no force and
effect from and after expiration of such 12-month period.  Options may be
granted and exercised under this Plan only after there has been compliance with
all applicable federal and state securities laws.

Plan adopted by the Board of Directors on March 1, 1997
Amendment to Plan approved by the Board of Directors on April 10, 2000

Plan approved by Stockholders on March 30, 1997
Amendment to Plan approved by Stockholders on May 25, 2000

                                       11

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