Document:

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     TENANT ESTOPPEL CERTIFICATE                              EXHIBIT 10.6

         The undersigned, Hytek Microsystems Inc., a California corporation
("Tenant"), is the tenant under that lease dated March, 1990, made with The
Mallard Company, A Business Trust Organization, successor in interest to
Rubin/Sadd Development,a Nevada Corporation ("Landlord") and does hereby certify
as follows:

         1.       Attached hereto is a true and correct copy or original of a
                  lease agreement between Landlord and the undersigned Tenant.
                  There are no amendments that are not attached. There are no
                  oral agreements or modifications to the lease. The attached
                  lease and two (2) amendments contain the complete agreement.

         2.       To Tenant's current actual knowledge. There are no breaches of
                  any covenant, condition, warranty or obligation, to Tenant's
                  current actual knowledge, under the lease agreement that give
                  rise to a default by Landlord or Tenant. Landlord is in full
                  compliance with all terms, conditions or covenants of the
                  lease agreement.

         3.       All payments on the lease agreement are current as of the date
                  of this certificate.

         4.       The monthly rent is presently $13,941.00 per month due on the
                  first of the month. The undersigned has not paid to Landlord
                  any amount as prepaid rent except for this month (current
                  rent) and has paid to Landlord the amount of $9,520.00 as
                  security deposit.

         5.       The lease expires on June 30, 2005, and has an option to
                  extend, pursuant to which the term can be extended for an
                  additional five years.

         6.       To Tenant's current actual knowledge, as of today, there are
                  no defenses or offsets to enforcement of the lease.

         7.       Tenant disclaims all right, title and interest to the leased
                  premises except those rights granted by the lease.

      Dated this 22nd day of October, 1999.

      TENANT
      Hytek Microsystems Inc.
      A California Corporation

      By: ______________________________
      Charles S. Byrne, President

<PAGE>

SUBORDINATION, NONDISTURBANCE AND ATTORNMENT AGREEMENT

         THIS AGREEMENT, made this 22nd day of October, 1999, The Mallard
Company, a Business Trust Organization, successor in interest to Rubin/Sadd
Development, a Nevada Corporation ("Owner"), HYTEK Microsystems, Inc., a
California Corporation ("Tenant") and FIRST SECURITY BANK OF NEVADA ("Lender").

                                   WITNESSETH:

         WHEREAS, Owner did enter into a lease with Tenant dated March, 1990
("Lease", covering all or part of the real property more commonly known as 400
Hot Springs Road, Carson City, County of Carson City, State of Nevada
("Property"); and

         WHEREAS, Owner has executed, or is about to execute, a note in the
amount of $750,000.00 in favor of Lender, payable with interest and upon the
terms and conditions described therein ("Note"); and

         WHEREAS, it is a condition precedent to advancing funds under the Note
that Owner execute a deed of trust in favor of Lender ("Deed of Trust") which
shall unconditionally be and remain at all times a lien or charge upon the
Property, prior and superior to the lien or charge of the Lease; and

         WHEREAS, Lender also requires that Tenant attorn to Lender and Lender's
assigns, and Tenant is willing to attorn to Lender and its assigns provided
Lender and its assigns do not disturb Tenant's right of quiet enjoyment so long
as Tenant is not in default beyond ant applicable cure period under the Lease;
and

         WHEREAS, it is to the mutual benefit of the parties hereto that Lender
advance the funds under the Note to Owner;

         NOW, THEREFORE in consideration of the mutual benefits accruing to the
parties hereto and other valuable consideration, the receipt and sufficiency of
which consideration is hereby acknowledged, and in order to induce Lender to
advance the funds under the Note, it is hereby declared, understood, and agreed
as follows:

   A.  SUBORDINATION

       (1) The Deed of Trust in favor of Lender, as to all obligations
recited as being secured thereby, and any renewal, modifications or extensions
thereof, shall unconditionally be and remain at all times a lien or charge on
the Property, prior and superior to the lien or charge of the Lease, and the
Lease and the Tenant's rights thereunder shall be unconditionally subordinate
and junior to the lien of the Deed of Trust.
Notwithstanding the foregoing subordination, the provisions of the lease
concerning alterations, disposition of insurance and condemnation proceeds, and
assignment and subletting shall prevail over any contrary or inconsistent
provisions contained in the Deed of Trust. In event the consent of Lender is
required before Tenant may take an action that it is otherwise permitted to take
under the lease, such consent of Lender shall not be reasonably withheld or
delayed

       (2) Lender will not advance funds under the Note without the execution
and delivery of this Subordination, Non disturbance and Attornment Agreement.

   B.  NONDISTURBANCE AND ATTORNMENT

       (1) As long as Tenant is not in default beyond any applicable cure
period the Lease, Lender or any other purchaser at foreclosure of the Deed of
Trust shall recognize and shall not disturb the leasehold estate of Tenant under
all of the terms, covenants and conditions of the Lease for the remaining
balance of the term and any extensions thereof with the same force and effect as
if Lender or such other purchaser were the original landlord under the Lease.

                                                       Subordination Agreement 1

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Without limiting the generality of the foregoing sentence, (I) Tenant's use and
possession of the Property and Tenant's rights and privileges (including,
without limitation, all extension options and rights) under the Lease and any
extensions thereof shall not be disturbed, diminished or in interfered with by
Lender in the exercise of any of its rights under the Deed of Trust or by any
succeeding owner of the Property as a result of the exercise by Lender of any
such rights, (ii) the Lease shall not be terminated or modified by the exercise
of any of Lender's rights under the Deed of Trust or by any succeeding owner of
the Property as a result of the exercise by Lender of any such rights, and (iii)
Lender will not join Tenant as a party defendant in any action or proceeding for
the purpose of terminating or modifying Tenant's interest and estate under the
Lease because of any default under the Deed of Trust or any other instrument
evidencing or securing the indebtedness secure thereby. Notwithstanding anything
to the contrary in the Deed of Trust, (a) Lender shall make all insurance
proceeds and condemnation awards received by it available for repair and
restoration of the Property to the extent necessary for Owner and Tenant to
fulfill their repair and restoration obligations under the Lease, and (b) any
and all insurance and condemnation proceeds payable with respect to Tenant's
property or interruption or relocation of Tenant's business will be paid to
Tenant. No foreclosure, deed in lieu of foreclosure or sale under Deed of Trust
shall affect Tenant's rights so long as Tenant is not in default beyond any
applicable cure period under the Lease.

            (2) In the event Lender foreclosed under the terms of any loan
document with Owner or the Deed of trust, Lender shall give Tenant notice in the
manner and to the extent prescribed by law.

            (3) In the event of foreclosure, exercise of any power of sale or
exercise of any other remedy under any loan document encumbering the Property,
Tenant agrees to accept and attorn to Lender or Lender's assigns or any
purchaser from Lender or any purchaser at foreclosure or trustee's sale as the
new owner of the premises, and so long as Tenant is not in default, beyond any
applicable cure period, under the Lease, said Lease shall, with regard to the
Property, continue in full force and effect as a direct lease between Lender or
its successors and assigns and Tenant.

            (4) Tenant acknowledges that Lender shall not be liable or
responsible for the return of any security deposit or prepaid rents which may
have been paid to Owner, unless actually received by Lender. Tenant agrees it
will not prepay Owner rent more than one month in advance under the terms of the
Lease. If Lender or any other person acquires fee title to the Property, Lender
or such other person will be entitled to the next month's rent (and any
percentage rents) regardless of any prepayment of Tenant to Landlord for more
than one month in advance.

             (5) Lender shall not be bound by any amendment to the Lease made
without prior written consent of Lender.

             (6) In the event of the transfer of the Property through
foreclosure, exercise of any power of sale, exercise of any rights under any
loan document encumbering the Property or any transfer or assignment of Lender's
interest therein, the purchaser or assignee shall take such interest free and
clear of any prior or existing default of the Owner under the terms of the
Lease. Lender or the new owner will assume and perform the obligations of the
Owner as of date. Lender or the new owner obtains title, so long as Tenant is
not in default beyond any applicable cure period under the Lease; provided,
however, that any such purchaser or assignee shall be responsible for continuing
defaults of the Owner (such as a continuing failure to repair and maintain the
Property).

              (7) This agreement may be executed in separate counterparts all of
which shall constitute a single instrument.

              (8) Owner agrees that nothing contained in this Agreement shall
impair, limit, abrogate or otherwise modify the obligations of Owner to Tenant
under the Lease and that the obligations of Owner under the Lease that have
accrued prior to any foreclosure of the Deed of Trust or sale of the Premises by
deed in lieu of foreclosure shall survive.

                                                       Subordination Agreement 2

<PAGE>

C.       BINDING EFFECT

        This agreement shall be binding upon the parties hereto, their
respective heirs, successors and assigns.

   LENDER:
   FIRST SECURITY BANK OF NEVADA

   By  _____________________________

   Its  _____________________________

   OWNER:
   THE MALLARD COMPANY, A BUSINESS TRUST ORGANIZATION
   (SUCCESSOR IN INTEREST TO RUBIN/SADD DEVELOPMENT, A NEVADA CORPORATION)

   By  ______________________

   Its  ______________________

   TENANT:
   HYTEK MICROSYSTEMS INC., A CALIFORNIA CORPORATION

   By  ______________________

   Its  _______________________

                                 LENDERS NOTARY

STATE OF  ______________)
                        ) SS.
COUNTY OF ______________)

   The foregoing instrument was acknowledged before me this ______ day of
__________, 1999, by ________________, ________________ of First Security Bank
of Nevada.

                                              _________________________________
                                              Notary Public

                                                       Subordination Agreement 3

<PAGE>

ADDENDUM

                REVISED PARAGRAPH (1) OF SUBORDINATION AGREEMENT

                   (1) As long as Tenant is not in default beyond any applicable
sure period under the Lease, Lender or any other purchaser at foreclosure of the
Deed of Trust shall recognize and shall not disturb the leasehold estate of
Tenant under all of the terms, covenants and conditions of the Lease for the
remaining balance of the term and any extensions thereof with the same force and
effect as if Lender or such other purchaser were the original landlord under the
Lease. Without limiting the generality of the foregoing sentence, (i) Tenant's
use and possession of the Property and Tenant's rights and privileges
(including, without limitation, all extension options and rights) under the
Lease and any extensions thereof shall not be disturbed, diminished or
interfered with by Lender in the exercise of any of its rights under the Deed of
Trust or by any succeeding owner of the Property as a result of the exercise by
Lender of any such rights. (ii) the Lease shall not be terminated or modified by
the exercise of any of Lender's rights under the Deed of Trust or by any
succeeding owner of the Property as a result of the exercise by Lender of any
such rights, and (iii) Lender will not join Tenant as a party defendant in any
action or proceeding for the purpose of terminating or modifying Tenant's
interest and estate under the Lease because of any default under the Deed of
Trust or any other instrument evidencing or securing the indebtedness secured
thereby. Notwithstanding any thing to the contrary in the Deed of Trust, (a)
Lender shall make all insurance proceeds and condemnation awards received by it
available for repair and restoration of the Property, pursuant to a commercially
reasonable disbursement procedure, to the extent necessary for Owner and Tenant
to fulfill their repair and restoration obligations under the Lease, and (b) any
and all insurance and condemnation proceeds payable with respect to Tenant's
property or the interruption or relocation of Tenant's business will be paid to
Tenant. No foreclosure, deed in lieu of foreclosure or sale under Deed of Trust
shall affect Tenant's rights so long as Tenant is not in default beyond any
applicable cure period under the Lease.

LENDER:
FIRST SECURITY BANK OF NEVADA

By  ____________________________

Its   ____________________________

OWNER:
THE MALLARD COMPANY, A BUSINESS TRUST ORGANIZATION
(SUCCESSOR IN INTEREST TO RUBIN/SADD DEVELOPMENT, A NEVADA CORPORATION)

By  ________________________

Its   ________________________

TENANT:
HYTEK MICROSYSTEMS INC., A CALIFORNIA CORPORATION

By  ________________________

Its  ________________________

<PAGE>

                                  OWNERS NOTARY

STATE OF ___________________)
                            ) SS.
COUNTY OF __________________)

            The foregoing instrument was acknowledged before me this __________
day of _______________, 1999, by ______________________________________________.

                                         _______________________________________
                                         Notary Public

TENANTS NOTARY

STATE OF ________________)
                         ) SS.
COUNTY OF _______________)

             The foregoing instrument was acknowledged before me this __________
day of ______________,_________, by ___________________________________________.

                                         _______________________________________
                                         Notary Public

                                                       Subordination Agreement 4<PAGE>

                            HYTEK MICROSYSTEMS, INC.                EXHIBIT 10.8

                                 2001 STOCK PLAN

                           (As adopted by the Board of
                         Directors on February 21, 2001)

1.       Purposes of the Plan.  The purposes of this 2001 Stock Plan are:

         o      to attract and retain the best available personnel for positions
                of substantial responsibility,

         o      to provide additional incentive to Employees, Directors and
                Consultants, and

         o      to promote the success of the Company's business.

         Options granted under the Plan may be Incentive Stock Options or
Nonstatutory Stock Options, as determined by the Administrator at the time of
grant. Stock Purchase Rights may also be granted under the Plan.

2.       Definitions.  As used herein, the following definitions shall apply:

         (a) "Administrator" means the Board or any of its Committees as shall
be administering the Plan, in accordance with Section 4 of the Plan.

         (b) "Applicable Laws" means the requirements relating to the
administration of stock option plans under U. S. state corporate laws, U.S.
federal and state securities laws, the Code, any stock exchange or quotation
system on which the Common Stock is listed or quoted and the applicable laws of
any foreign country or jurisdiction where Options or Stock Purchase Rights are,
or will be, granted under the Plan.

         (c) "Board" means the Board of Directors of the Company.

         (d) "Code" means the Internal Revenue Code of 1986, as amended.

         (e) "Committee" means a committee of Directors appointed by the Board
in accordance with Section 4 of the Plan.

         (f) "Common Stock" means the common stock of the Company.

         (g) "Company" means Hytek Microsystems, Inc., a California corporation.

         (h) "Consultant" means any person, including an advisor, engaged by the
Company or a Parent or Subsidiary to render services to such entity.

         (i) "Director" means a member of the Board.

<PAGE>

         (j) "Disability" means total and permanent disability as defined in
Section 22(e)(3) of the Code.

         (k) "Employee" means any person, including Officers and Directors,
employed by the Company or any Parent or Subsidiary of the Company. A Service
Provider shall not cease to be an Employee in the case of (i) any leave of
absence approved by the Company or (ii) transfers between locations of the
Company or between the Company, its Parent, any Subsidiary, or any successor.
For purposes of Incentive Stock Options, no such leave may exceed ninety (90)
days, unless reemployment upon expiration of such leave is guaranteed by statute
or contract. If reemployment upon expiration of a leave of absence approved by
the Company is not so guaranteed, on the 181st day of such leave any Incentive
Stock Option held by the Optionee shall cease to be treated as an Incentive
Stock Option and shall be treated for tax purposes as a Nonstatutory Stock
Option. Neither service as a Director nor payment of a director's fee by the
Company shall be sufficient to constitute "employment" by the Company.

         (l) "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

         (m) "Fair Market Value" means, as of any date, the value of Common
Stock determined as follows:

            (i) If the Common Stock is listed on any established stock exchange
or a national market system, including without limitation the Nasdaq National
Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, 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 exchange or system for the last market
trading day prior to the time of determination, as reported in The Wall Street
Journal or such other source as the Administrator deems reliable;

            (ii) If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, the Fair Market Value of
a Share of Common Stock shall be the mean between the high bid and low asked
prices for the Common Stock on the last market trading day prior to the day of
determination, as reported in The Wall Street Journal or such other source as
the Administrator deems reliable; or

            (iii) In the absence of an established market for the Common Stock,
the Fair Market Value shall be determined in good faith by the Administrator.

         (n) "Incentive Stock Option" means an Option intended to qualify as an
incentive stock option within the meaning of Section 422 of the Code and the
regulations promulgated thereunder.

         (o) "Nonstatutory Stock Option" means an Option not intended to qualify
as an Incentive Stock Option.

         (p) "Notice of Grant" means a written or electronic notice evidencing
certain terms and conditions of an individual Option or Stock Purchase Right
grant. The Notice of Grant is part of the Option Agreement.

                                      -2-
<PAGE>

         (q) "Officer" means a person who is an officer of the Company within
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

         (r) "Option" means a stock option granted pursuant to the Plan.

         (s) "Option Agreement" means an agreement between the Company and an
Optionee evidencing the terms and conditions of an individual Option grant. The
Option Agreement is subject to the terms and conditions of the Plan.

         (t) "Option Exchange Program" means a program whereby outstanding
Options are surrendered in exchange for Options with a lower exercise price.

         (u) "Optioned Stock" means the Common Stock subject to an Option or
Stock Purchase Right.

         (v) "Optionee" means the holder of an outstanding Option or Stock
Purchase Right granted under the Plan.

         (w) "Parent" means a "parent corporation," whether now or hereafter
existing, as defined in Section 424(e) of the Code.

         (x) "Plan" means this Hytek Microsystems, Inc. 2001 Stock Plan.

         (y) "Restricted Stock" means shares of Common Stock acquired pursuant
to a grant of Stock Purchase Rights under Section 11 of the Plan.

         (z) "Restricted Stock Purchase Agreement" means a written agreement
between the Company and the Optionee evidencing the terms and restrictions
applying to stock purchased under a Stock Purchase Right. The Restricted Stock
Purchase Agreement is subject to the terms and conditions of the Plan and the
Notice of Grant.

         (aa) "Rule 16b-3" means Rule 16b-3 of the Exchange Act or any successor
to Rule 16b-3, as in effect when discretion is being exercised with respect to
the Plan.

         (bb) "Section 16(b) " means Section 16(b) of the Exchange Act.

         (cc) "Service Provider" means an Employee or Consultant.

         (dd) "Share" means a share of the Common Stock, as adjusted in
accordance with Section 13 of the Plan.

         (ee) "Stock Purchase Right" means the right to purchase Common Stock
pursuant to Section 11 of the Plan, as evidenced by a Notice of Grant.

         (ff) "Subsidiary" means a "subsidiary corporation", whether now or
hereafter existing, as defined in Section 424(f) of the Code.

                                       -3-
<PAGE>

        3.       Stock Subject to the Plan. Subject to the provisions of
Section 13 of the Plan, the maximum aggregate number of Shares that may be
optioned and sold under the Plan is 131,000 Shares. The Shares may be
authorized, but unissued, or reacquired Common Stock.

        If an Option or Stock Purchase Right expires or becomes unexercisable
without having been exercised in full, or is surrendered pursuant to an Option
Exchange Program, the unpurchased Shares that were subject thereto shall become
available for future grant or sale under the Plan (unless the Plan has
terminated); provided, however, that Shares that have actually been issued under
the Plan, whether upon exercise of an Option or Stock Purchase Right, shall not
be returned to the Plan and shall not become available for future distribution
under the Plan, except that if Shares of Restricted Stock are repurchased by the
Company at their original purchase price, such Shares shall become available for
future grant under the Plan.

        4.       Administration of the Plan.

                 (a) Procedure.

                     (i) Multiple Administrative Bodies. Different Committees
with respect to different groups of Service Providers may administer the Plan.

                     (ii) Section 162(m). To the extent that the Administrator
determines it to be desirable to qualify Options granted hereunder as
"performance-based compensation" within the meaning of Section 162(m) of the
Code, the Plan shall be administered by a Committee of two or more "outside
directors" within the meaning of Section 162(m) of the Code.

                     (iii) Rule 16b-3. To the extent desirable to qualify
transactions hereunder as exempt under Rule 16b-3, the transactions contemplated
hereunder shall be structured to satisfy the requirements for exemption under
Rule 16b-3.

                     (iv) Other Administration. Other than as provided above,
the Plan shall be administered by (A) the Board or (B) a Committee, which
committee shall be constituted to satisfy Applicable Laws.

                 (b) Powers of the Administrator. Subject to the provisions of
the Plan, and in the case of a Committee, subject to the specific duties
delegated by the Board to such Committee, the Administrator shall have the
authority, in its discretion:

                     (i) to determine the Fair Market Value;

                     (ii) to select the Service Providers to whom Options and
Stock Purchase Rights may be granted hereunder;

                     (iii) to determine the number of shares of Common Stock to
be covered by each Option and Stock Purchase Right granted hereunder;

                     (iv) to approve forms of agreement for use under the Plan;

                                       -4-
<PAGE>

                (v) to determine the terms and conditions, not inconsistent with
the terms of the Plan, of any Option or Stock Purchase Right granted hereunder.
Such terms and conditions include, but are not limited to, the exercise price,
the time or times when Options or Stock Purchase Rights may be exercised (which
may be based on performance criteria), any vesting acceleration or waiver of
forfeiture restrictions, and any restriction or limitation regarding any Option
or Stock Purchase Right or the shares of Common Stock relating thereto, based in
each case on such factors as the Administrator, in its sole discretion, shall
determine;

                (vi) to reduce the exercise price of any Option or Stock
Purchase Right to the then current Fair Market Value if the Fair Market Value of
the Common Stock covered by such Option or Stock Purchase Right shall have
declined since the date the Option or Stock Purchase Right was granted;

                (vii) to institute an Option Exchange Program;

                (viii) to construe and interpret the terms of the Plan and
awards granted pursuant to the Plan;

                (ix) to prescribe, amend and rescind rules and regulations
relating to the Plan, including rules and regulations relating to sub-plans
established for the purpose of qualifying for preferred tax treatment under
foreign tax laws;

                (x) to modify or amend each Option or Stock Purchase Right
(subject to Section 15(c) of the Plan), including the discretionary authority to
extend the post-termination exercisability period of Options longer than is
otherwise provided for in the Plan;

                (xi) to allow Optionees to satisfy withholding tax obligations
by electing to have the Company withhold from the Shares to be issued upon
exercise of an Option or Stock Purchase Right that number of Shares having a
Fair Market Value equal to the amount required to be withheld. The Fair Market
Value of the Shares to be withheld shall be determined on the date that the
amount of tax to be withheld is to be determined. All elections by an Optionee
to have Shares withheld for this purpose shall be made in such form and under
such conditions as the Administrator may deem necessary or advisable;

                (xii) to authorize any person to execute on behalf of the
Company any instrument required to effect the grant of an Option or Stock
Purchase Right previously granted by the Administrator;

                (xiii) to make all other determinations deemed necessary or
advisable for administering the Plan.

         (c) Effect of Administrator's Decision. The Administrator's decisions,
determinations and interpretations shall be final and binding on all Optionees
and any other holders of Options or Stock Purchase Rights.

     5. Eligibility. Nonstatutory Stock Options and Stock Purchase Rights may be
granted to Service Providers. Incentive Stock Options may be granted only to
Employees.

                                       -5-
<PAGE>

     6. Limitations.

         (a) ISO Status. Each Option shall be designated in the Option Agreement
as either an Incentive Stock Option or a Nonstatutory Stock Option. However,
notwithstanding such designation, to the extent that the aggregate Fair Market
Value of the Shares with respect to which Incentive Stock Options are
exercisable for the first time by the Optionee during any calendar year (under
all plans of the Company and any Parent or Subsidiary) exceeds $100,000, such
Options shall be treated as Nonstatutory Stock Options. For purposes of this
Section 6(a), Incentive Stock Options shall be taken into account in the order
in which they were granted. The Fair Market Value of the Shares shall be
determined as of the time the Option with respect to such Shares is granted.

         (b) No Employment Agreement. Neither the Plan nor any Option or Stock
Purchase Right shall confer upon an Optionee any right with respect to
continuing the Optionee's relationship as a Service Provider with the Company,
nor shall they interfere in any way with the Optionee's right or the Company's
right to terminate such relationship at any time, with or without cause.

         (c) Section 162(m) Limits. The following limitations shall apply to
grants of Options:

                (i) No Service Provider shall be granted, in any fiscal year of
the Company, Options to purchase more than 50,000 Shares.

                (ii) In connection with his or her initial service, a Service
Provider may be granted Options to purchase up to an additional 50,000 Shares,
which shall not count against the limit set forth in subsection (i) above.

                (iii) The foregoing limitations shall be adjusted
proportionately in connection with any change in the Company's capitalization as
described in Section 13.

                (iv) If an Option is cancelled in the same fiscal year of the
Company in which it was granted (other than in connection with a transaction
described in Section 13), the cancelled Option will be counted against the
limits set forth in subsections (i) and (ii) above. For this purpose, if the
exercise price of an Option is reduced, the transaction will be treated as a
cancellation of the Option and the grant of a new Option.

      7. Term of Plan. The Plan, the Plan shall become effective upon its
approval by the shareholders. It shall continue in effect for a term of ten (10)
years unless terminated earlier under Section 15 of the Plan.

      8. Term of Option. The term of each Option shall be stated in the Option
Agreement. In the case of an Incentive Stock Option, the term shall be ten (10)
years from the date of grant or such shorter term as may be provided in the
Option Agreement. Moreover, in the case of an Incentive Stock Option granted to
an Optionee who, at the time the Incentive Stock Option is granted, owns stock
representing more than ten percent (10%) of the total combined voting power of
all classes of stock of the Company or any Parent or Subsidiary, the term of the
Incentive Stock Option shall be five (5) years from the date of grant or such
shorter term as may be provided in the Option Agreement.

                                       -6-
<PAGE>

      9. Option Exercise Price and Consideration.

         (a) Exercise Price. The per share exercise price for the Shares to be
issued pursuant to exercise of an Option shall be determined by the
Administrator, subject to the following:

                (i) In the case of an Incentive Stock Option

                      (A) granted to an Employee who, at the time the Incentive
Stock Option is granted, owns stock representing more than ten percent (10%) of
the voting power of all classes of stock of the Company or any Parent or
Subsidiary, the per Share exercise price shall be no less than 110% of the Fair
Market Value per Share on the date of grant.

                      (B) granted to any Employee other than an Employee
described in paragraph (A) immediately above, the per Share exercise price shall
be no less than 100% of the Fair Market Value per Share on the date of grant.

                (ii) In the case of a Nonstatutory Stock Option, the per Share
exercise price shall be no less than 100% of the Fair Market Value per Share on
the date of grant.

                (iii) Notwithstanding the foregoing, Options may be granted with
a per Share exercise price of less than 100% of the Fair Market Value per Share
on the date of grant pursuant to a merger or other corporate transaction.

         (b) Waiting Period and Exercise Dates. At the time an Option is
granted, the Administrator shall fix the period within which the Option may be
exercised and shall determine any conditions that must be satisfied before the
Option may be exercised.

         (c) Form of Consideration. The Administrator shall determine the
acceptable form of consideration for exercising an Option, including the method
of payment. In the case of an Incentive Stock Option, the Administrator shall
determine the acceptable form of consideration at the time of grant. Such
consideration may consist entirely of:

                (i) cash;

                (ii) check;

                (iii) promissory note;

                (iv) other Shares which (A) in the case of Shares acquired upon
exercise of an option, have been owned by the Optionee for more than six months
on the date of surrender, and (B) have a Fair Market Value on the date of
surrender equal to the aggregate exercise price of the Shares as to which said
Option shall be exercised;

                (v) consideration received by the Company under a cashless
exercise program implemented by the Company in connection with the Plan;

                                      -7-
<PAGE>

                (vi) a reduction in the amount of any Company liability to the
Optionee, including any liability attributable to the Optionee's participation
in any Company-sponsored deferred compensation program or arrangement;

                (vii) any combination of the foregoing methods of payment; or

                (viii) such other consideration and method of payment for the
issuance of Shares to the extent permitted by Applicable Laws.

10.      Exercise of Option.

         (a) Procedure for Exercise; Rights as a Shareholder. Any Option granted
hereunder shall be exercisable according to the terms of the Plan and at such
times and under such conditions as determined by the Administrator and set forth
in the Option Agreement. Unless the Administrator provides otherwise, vesting of
Options granted hereunder shall be tolled during any unpaid leave of absence. An
Option may not be exercised for a fraction of a Share.

             An Option shall be deemed exercised when the Company receives: (i)
written or electronic notice of exercise (in accordance with the Option
Agreement) from the person entitled to exercise the Option, and (ii) full
payment for the Shares with respect to which the Option is exercised. Full
payment may consist of any consideration and method of payment authorized by the
Administrator and permitted by the Option Agreement and the Plan. Shares issued
upon exercise of an Option shall be issued in the name of the Optionee or, if
requested by the Optionee, in the name of the Optionee and his or her spouse.
Until the Shares are issued (as evidenced by the appropriate entry on the books
of the Company or of a duly authorized transfer agent of the Company), no right
to vote or receive dividends or any other rights as a shareholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such Shares promptly after the
Option is exercised. No adjustment will be made for a dividend or other right
for which the record date is prior to the date the Shares are issued, except as
provided in Section 13 of the Plan.

          Exercising an Option in any manner shall decrease the number of Shares
thereafter available, both for purposes of the Plan and for sale under the
Option, by the number of Shares as to which the Option is exercised.

         (b) Termination of Relationship as a Service Provider. If an Optionee
ceases to be a Service Provider, other than upon the Optionee's death or
Disability, the Optionee may exercise his or her Option within such period of
time as is specified in the Option Agreement to the extent that the Option is
vested on the date of termination (but in no event later than the expiration of
the term of such Option as set forth in the Option Agreement). In the absence of
a specified time in the Option Agreement, the Option shall remain exercisable
for three (3) months following the Optionee's termination. If, on the date of
termination, the Optionee is not vested as to his or her entire Option, the
Shares covered by the unvested portion of the Option shall revert to the Plan.
If, after termination, the Optionee does not exercise his or her Option within
the time specified by the Administrator, the Option shall terminate, and the
Shares covered by such Option shall revert to the Plan.

                                       -8-
<PAGE>

         (c) Disability of Optionee. If an Optionee ceases to be a Service
Provider as a result of the Optionee's Disability, the Optionee may exercise his
or her Option within such period of time as is specified in the Option Agreement
to the extent the Option is vested on the date of termination (but in no event
later than the expiration of the term of such Option as set forth in the Option
Agreement). In the absence of a specified time in the Option Agreement, the
Option shall remain exercisable for six (6) months following the Optionee's
termination. If, on the date of termination, the Optionee is not vested as to
his or her entire Option, the Shares covered by the unvested portion of the
Option shall revert to the Plan. If, after termination, the Optionee does not
exercise his or her Option within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

         (d) Death of Optionee. If an Optionee dies while a Service Provider,
the Option may be exercised within such period of time as is specified in the
Option Agreement (but in no event later than the expiration of the term of such
Option as set forth in the Notice of Grant), by the Optionee's estate or by a
person who acquires the right to exercise the Option by bequest or inheritance,
but only to the extent that the Option is vested on the date of death. In the
absence of a specified time in the Option Agreement, the Option shall remain
exercisable for six (6) months following the Optionee's termination. If, at the
time of death, the Optionee is not vested as to his or her entire Option, the
Shares covered by the unvested portion of the Option shall immediately revert to
the Plan. The Option may be exercised by the executor or administrator of the
Optionee's estate or, if none, by the person(s) entitled to exercise the Option
under the Optionee's will or the laws of descent or distribution. If the Option
is not so exercised within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

         (e) Buyout Provisions. The Administrator may at any time offer to buy
out for a payment in cash or Shares an Option previously granted based on such
terms and conditions as the Administrator shall establish and communicate to the
Optionee at the time that such offer is made.

     11. Stock Purchase Rights.

         (a) Rights to Purchase. Stock Purchase Rights may be issued either
alone, in addition to, or in tandem with other awards granted under the Plan
and/or cash awards made outside of the Plan. After the Administrator determines
that it will offer Stock Purchase Rights under the Plan, it shall advise the
offeree in writing or electronically, by means of a Notice of Grant, of the
terms, conditions and restrictions related to the offer, including the number of
Shares that the offeree shall be entitled to purchase, the price to be paid, and
the time within which the offeree must accept such offer. The offer shall be
accepted by execution of a Restricted Stock Purchase Agreement in the form
determined by the Administrator.

         (b) Repurchase Option. Unless the Administrator determines otherwise,
the Restricted Stock Purchase Agreement shall grant the Company a repurchase
option exercisable upon the voluntary or involuntary termination of the
purchaser's service with the Company for any reason (including death or
Disability). The purchase price for Shares repurchased pursuant to the
Restricted Stock Purchase Agreement shall be the original price paid by the
purchaser and may be paid by cancellation of any indebtedness of the purchaser
to the Company. The repurchase option shall lapse at a rate determined by the
Administrator.

                                       -9-
<PAGE>

         (c) Other Provisions. The Restricted Stock Purchase Agreement shall
contain such other terms, provisions and conditions not inconsistent with the
Plan as may be determined by the Administrator in its sole discretion.

         (d) Rights as a Shareholder. Once the Stock Purchase Right is
exercised, the purchaser shall have the rights equivalent to those of a
shareholder, and shall be a shareholder when his or her purchase is entered upon
the records of the duly authorized transfer agent of the Company. No adjustment
will be made for a dividend or other right for which the record date is prior to
the date the Stock Purchase Right is exercised, except as provided in Section 13
of the Plan.

      12. Non-Transferability of Options and Stock Purchase Rights. Unless
determined otherwise by the Administrator, an Option or Stock Purchase Right may
not be sold, pledged, assigned, hypothecated, transferred, or disposed of in any
manner other than by will or by the laws of descent or distribution and may be
exercised, during the lifetime of the Optionee, only by the Optionee. If the
Administrator makes an Option or Stock Purchase Right transferable, such Option
or Stock Purchase Right shall contain such additional terms and conditions as
the Administrator deems appropriate.

     13. Adjustments Upon Changes in Capitalization, Dissolution, Merger or
         Asset Sale.

      (a) Changes in Capitalization. Subject to any required action by the
shareholders of the Company, the number of shares of Common Stock covered by
each outstanding Option and Stock Purchase Right, and the number of shares of
Common Stock that have been authorized for issuance under the Plan but as to
which no Options or Stock Purchase Rights have yet been granted or that have
been returned to the Plan upon cancellation or expiration of an Option or Stock
Purchase Right, as well as the price per share of Common Stock covered by each
such outstanding Option or Stock Purchase Right, shall be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock, or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of consideration by the Company; provided, however, that conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration." Such adjustment shall be made by the Board,
whose determination in that respect shall be final, binding and conclusive.
Except as expressly provided herein, no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the number or price of shares of Common Stock subject to an Option or Stock
Purchase Right.

      (b) Dissolution or Liquidation. In the event of the proposed dissolution
or liquidation of the Company, the Administrator shall notify each Optionee as
soon as practicable prior to the effective date of such proposed transaction.
The Administrator in its discretion may provide for an Optionee to have the
right to exercise his or her Option until ten (10) days prior to such
transaction as to all of the Optioned Stock covered thereby, including Shares as
to which the Option would not otherwise be exercisable. In addition, the
Administrator may provide that any Company repurchase option applicable to any
Shares purchased upon exercise of an Option or Stock Purchase Right shall lapse
as to all such Shares, provided the proposed dissolution or liquidation takes
place at the time and in the manner contemplated. To the extent it has not been
previously

                                      -10-
<PAGE>

exercised, an Option or Stock Purchase Right will terminate immediately prior to
the consummation of such proposed action.

      (c) Merger or Asset Sale. In the event of a merger of the Company with or
into another corporation, or the sale of substantially all of the assets of the
Company, each outstanding Option and Stock Purchase Right shall be assumed or an
equivalent option or right substituted by the successor corporation or a Parent
or Subsidiary of the successor corporation. In the event that the successor
corporation refuses to assume or substitute for the Option or Stock Purchase
Right, the Optionee shall fully vest in and have the right to exercise the
Option or Stock Purchase Right as to all of the Optioned Stock, including Shares
as to which it would not otherwise be vested or exercisable. If an Option or
Stock Purchase Right becomes fully vested and exercisable in lieu of assumption
or substitution in the event of a merger or sale of assets, the Administrator
shall notify the Optionee in writing or electronically that the Option or Stock
Purchase Right shall be fully vested and exercisable for a period of fifteen
(15) days from the date of such notice, and the Option or Stock Purchase Right
shall terminate upon the expiration of such period. For the purposes of this
paragraph, the Option or Stock Purchase Right shall be considered assumed if,
following the merger or sale of assets, the option or right confers the right to
purchase or receive, for each Share of Optioned Stock subject to the Option or
Stock Purchase Right immediately prior to the merger or sale of assets, the
consideration (whether stock, cash, or other securities or property) received in
the merger or sale of assets by holders of Common Stock for each Share held on
the effective date of the transaction (and if holders were offered a choice of
consideration, the type of consideration chosen by the holders of a majority of
the outstanding Shares); provided, however, that if such consideration received
in the merger or sale of assets is not solely common stock of the successor
corporation or its Parent, the Administrator may, with the consent of the
successor corporation, provide for the consideration to be received upon the
exercise of the Option or Stock Purchase Right, for each Share of Optioned Stock
subject to the Option or Stock Purchase Right, to be solely common stock of the
successor corporation or its Parent equal in fair market value to the per share
consideration received by holders of Common Stock in the merger or sale of
assets.

      (d) Change in Control. In the event of a "Change in Control" of the
Company, as defined in paragraph (e) below, unless otherwise determined by the
Administrator prior to the occurrence of such Change in Control, any Options
outstanding on the date such Change in Control is determined to have occurred
that are not yet exercisable and vested on such date shall become fully
exercisable and vested.

      (e) Definition of "Change in Control". For purposes of this Section 13, a
"Change in Control" means the happening of any of the following:

                (i) When any "person", as such term is used in Sections 13(d)
and 14(d) of the Exchange Act (other than the Company, a Subsidiary or a Company
employee benefit plan, including any trustee of such plan acting as trustee) is
or becomes the "beneficial owner" (as defined in Rule 13d-3 promulgated under
the Exchange Act), directly or indirectly, of securities of the Company
representing fifty percent (50%) or more of the combined voting power of the
Company's then outstanding securities; or

                                      -11-
<PAGE>

                (ii) The shareholders of the Company approve a merger or
consolidation of the Company with any other corporation, other than a merger or
consolidation that would result in the voting securities of the Company
outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into voting securities of the
surviving entity) at least fifty percent (50%) of the total voting power
represented by the voting securities of the Company or such surviving entity
outstanding immediately after such merger or consolidation, or the shareholders
of the Company approve an agreement for the sale or disposition by the Company
of all or substantially all of the Company's assets; or

                (iii) A change in the composition of the Board as a result of
which fewer than a majority of the directors in office are Incumbent Directors.
"Incumbent Directors" shall mean directors who either (A) are directors of the
Company as of the date of adoption of the Plan by the Board, or (B) are elected,
or nominated for election, to the Board with the affirmative votes of at least a
majority of the Incumbent Directors at the time of such election or nomination
(but shall not include an individual whose election or nomination is in
connection with an actual or threatened proxy contest relating to the election
of directors to the Company).

     14. Date of Grant. The date of grant of an Option or Stock Purchase Right
shall be, for all purposes, the date on which the Administrator makes the
determination granting such Option or Stock Purchase Right, or such other later
date as is determined by the Administrator. Notice of the determination shall be
provided to each Optionee within a reasonable time after the date of such grant.

    15. Amendment and Termination of the Plan.

         (a) Amendment and Termination. The Board may at any time amend, alter,
suspend or terminate the Plan.

         (b) Shareholder Approval. The Company shall obtain shareholder approval
of any Plan amendment to the extent necessary and desirable to comply with
Applicable Laws.

         (c) Effect of Amendment or Termination. No amendment, alteration,
suspension or termination of the Plan shall impair the rights of any Optionee,
unless mutually agreed otherwise between the Optionee and the Administrator,
which agreement must be in writing and signed by the Optionee and the Company.
Termination of the Plan shall not affect the Administrator's ability to exercise
the powers granted to it hereunder with respect to Options granted under the
Plan prior to the date of such termination.

     16. Conditions Upon Issuance of Shares.

         (a) Legal Compliance. Shares shall not be issued pursuant to the
exercise of an Option or Stock Purchase Right unless the exercise of such Option
or Stock Purchase Right and the issuance and delivery of such Shares shall
comply with Applicable Laws and shall be further subject to the approval of
counsel for the Company with respect to such compliance.

         (b) Investment Representations. As a condition to the exercise of an
Option or Stock Purchase Right, the Company may require the person exercising
such Option or Stock Purchase Right to represent and warrant at the time of any
such exercise that the Shares are being

                                      -12-
<PAGE>

purchased only for investment and without any present intention to sell or
distribute such Shares if, in the opinion of counsel for the Company, such a
representation is required.

         (c) Inability to Obtain Authority. The inability of the Company to
obtain authority from any regulatory body having jurisdiction, which authority
is deemed by the Company's counsel to be necessary to the lawful issuance and
sale of any Shares hereunder, shall relieve the Company of any liability in
respect of the failure to issue or sell such Shares as to which such requisite
authority shall not have been obtained.

         (d) Grants Exceeding Allotted Shares. If the Optioned Stock covered by
an Option exceeds, as of the date of grant, the number of Shares that may be
issued under the Plan without additional shareholder approval, such Option shall
be void, and shall not be exercisable, with respect to such excess Optioned
Stock, unless shareholder approval of an amendment sufficiently increasing the
number of Shares subject to the Plan to permit full exercise of the Option is
timely obtained in accordance with Section 15(b) of the Plan.

     17. Stock Withholding to Satisfy Withholding Tax Obligations.

         (a) Ability to Use Stock for Withholding. At the discretion of the
Administrator, Optionees may satisfy withholding obligations as provided in this
Section 17. When an Optionee incurs tax liability in connection with the
exercise of an Option, which tax liability is subject to tax withholding under
applicable tax laws, and the Optionee is obligated to pay the Company an amount
required to be withheld under applicable tax laws, the Optionee may satisfy the
withholding tax obligation by electing to have the Company withhold from the
Shares to be issued upon exercise of the Option that number of Shares having a
Fair Market Value equal to the amount required to be withheld. The Fair Market
Value of the Shares to be withheld shall be determined on the date that the
amount of tax to be withheld is to be determined (the "Tax Date").

         (b) Election to Have Stock Withheld. All elections by an Optionee to
have Shares withheld for this purpose shall be made in writing in a form
acceptable to the Administrator and shall be subject to the following
restrictions:
                (i) the election must be made on or prior to the applicable Tax
Date;

                (ii) once made, the election shall be irrevocable as to the
particular Shares of the Option as to which the election is made (unless
otherwise permitted by applicable tax regulations under the Code);

                (iii) all elections shall be subject to the consent or
disapproval of the Administrator; and

                (iv) if the Optionee is a Director, Officer or 10% Shareholder,
the election must comply with the applicable provisions of Rule 16b-3 and shall
be subject to such additional conditions or restrictions as may be required
thereunder to qualify for the maximum exemption from Section 16 of the Exchange
Act with respect to Plan transactions.

                                      -13-
<PAGE>

         (c) Section 83(b) Election. In the event the election to have Shares
withheld is made by an Optionee, no election is filed under Section 83(b) of the
Code and the Tax Date is deferred under Section 83 of the Code, the Optionee
shall receive the full number of Shares with respect to which the Option is
exercised but such Optionee shall be unconditionally obligated to tender back to
the Company the proper number of Shares on the Tax Date.

     18. Reservation of Shares. The Company, during the term of this Plan, will
at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

     19. Shareholder Approval. The Plan shall be subject to approval by the
shareholders of the Company within twelve (12) months after the date the Plan is
adopted. Such shareholder approval shall be obtained in the manner and to the
degree required under Applicable Laws.

                                      -14-

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