Document:

Note dated August 23, 2005  $75,000

 EXHIBIT 10.21 
  
 NOTE 
  
 US$75,000 
  
 Palo Alto, California 
  
 August 23, 2005 
  
 FOR
VALUE RECEIVED, the undersigned, AVICENA GROUP, INC., having an address of 228 Hamilton Avenue, 3rd Floor,
Palo Alto, CA 94301 (the “Borrower”), hereby promises to pay to the order of Wael Mohamed el-Bahey Mostafa, having an address of 8 el Sawsan St., el Nada Compound, El Sheikh Zayad, 6th October City, Egypt (the “Lender”), the principal sum of Seventy-Five Thousand Dollars ($75,000) (All monetary amounts herein are expressed in
U.S. Dollars). Principal on this Note shall become due and payable six months from the date of this Note or such earlier date as the Borrower shall complete its proposed merger with AVN Acquisition Corp. (the “Maturity Date”). Interest on
the outstanding principal amount shall not begin to accrue until the Maturity Date. After the Maturity Date, interest on the outstanding principal amount shall accrue at the rate of eight percent (8%) per annum. 
  
 The Borrower shall have the option of prepaying the unpaid portion of such
principal sum in full or part at any time before the Maturity Date without any premium or penalty. 
  
 All amounts owing pursuant to this Note but not yet paid shall, without any notice, demand, presentment or protest of any kind, automatically become
immediately due if the Borrower commences or has commenced against it any bankruptcy or insolvency proceeding. All amounts owing pursuant to this Note but not yet paid shall, without any notice, demand, presentment or protest of any kind, become
immediately due at the sole option of the Lender if (1) any amount owing pursuant to this Note is not paid when due, or (2) the Borrower is dissolved, or becomes insolvent (however such insolvency is evidenced). 
  
 All payments under this Note are to be made to the Lender at the
Lender’s address referenced above or at such other address as the Lender may from time to time designate in writing. 
  
 The Borrower promises to pay reasonable costs and expenses incurred by the Lender in collecting this Note and enforcing the Lender’s rights
hereunder, including, but not limited to, the reasonable fees and disbursements of legal counsel to the Lender. 
  
 Failure or delay by the Lender in exercising, or a single or partial exercise of, any power or right hereunder shall not operate as a waiver thereof or of
any other power or right or preclude any other future exercise of that or any other power or right. A waiver of any power or right hereunder shall be in writing, shall be limited to the specific instance and shall not be deemed a waiver of the
subject power or right in the future or a waiver of any other power or right. 
  
 This Note may not be modified or terminated orally or by any course of conduct but only by an agreement in writing duly executed by the Borrower and the Lender. 

 This Note shall be governed by and construed, interpreted and enforced in accordance with the internal
law of the State of California, without regard to principles of conflict of laws. 
  

			
	 AVICENA GROUP, INC.

		
	 By:
	 	 /s/ Belinda Tsao Nivaggioli

	 	 	 Belinda Tsao Nivaggioli

	 	 	 Chief Executive Officer

  

 2Note dated October 3, 2005  $50,000

 EXHIBIT 10.22 
  
 NOTE 
  
 US$50,000 
  
 Palo Alto, California 
  
 October 3, 2005 
  
 FOR
VALUE RECEIVED, the undersigned, AVICENA GROUP, INC., having an address of 228 Hamilton Avenue, 3rd Floor,
Palo Alto, CA 94301 (the “Borrower”), hereby promises to pay to the order of Nasser Menhall, having an address of One Cambridge Center, 5/F, Cambridge, MA 02142 (the “Lender”), the principal sum of Fifty Thousand Dollars
($50,000) (All monetary amounts herein are expressed in U.S. Dollars). Principal on this Note shall become due and payable six months from the date of this Note or such earlier date as the Borrower shall complete its proposed merger with AVN
Acquisition Corp. (the “Maturity Date”). Interest on the outstanding principal amount shall not begin to accrue until the Maturity Date. After the Maturity Date, interest on the outstanding principal amount shall accrue at the rate of
eight percent (8%) per annum. 
  
 The Borrower shall have the
option of prepaying the unpaid portion of such principal sum in full or part at any time before the Maturity Date without any premium or penalty. 
  
 All amounts owing pursuant to this Note but not yet paid shall, without any notice, demand, presentment or protest of any kind, automatically become
immediately due if the Borrower commences or has commenced against it any bankruptcy or insolvency proceeding. All amounts owing pursuant to this Note but not yet paid shall, without any notice, demand, presentment or protest of any kind, become
immediately due at the sole option of the Lender if (1) any amount owing pursuant to this Note is not paid when due, or (2) the Borrower is dissolved, or becomes insolvent (however such insolvency is evidenced). 
  
 All payments under this Note are to be made to the Lender at the
Lender’s address referenced above or at such other address as the Lender may from time to time designate in writing. 
  
 The Borrower promises to pay reasonable costs and expenses incurred by the Lender in collecting this Note and enforcing the Lender’s rights
hereunder, including, but not limited to, the reasonable fees and disbursements of legal counsel to the Lender. 
  
 Failure or delay by the Lender in exercising, or a single or partial exercise of, any power or right hereunder shall not operate as a waiver thereof or of
any other power or right or preclude any other future exercise of that or any other power or right. A waiver of any power or right hereunder shall be in writing, shall be limited to the specific instance and shall not be deemed a waiver of the
subject power or right in the future or a waiver of any other power or right. 
  
 This Note may not be modified or terminated orally or by any course of conduct but only by an agreement in writing duly executed by the Borrower and the Lender. 

 This Note shall be governed by and construed, interpreted and enforced in accordance with the internal
law of the State of California, without regard to principles of conflict of laws. 
  

			
	 AVICENA GROUP, INC.

		
	 By:
	 	 /s/ Belinda Tsao Nivaggioli

	 	 	 Belinda Tsao Nivaggioli

	 	 	 Chief Executive Officer

  

 2Form of Promissory Note

 Exhibit 10.23 
  
 NOTE 
  

			
	US $350,000	  	 Palo Alto, California
 November 4, 2005

  
 FOR VALUE RECEIVED, the
undersigned, AVICENA GROUP, INC., having an address of 228 Hamilton Avenue, Third Floor, Palo Alto, CA 94301 (the “Borrower”), hereby promises to pay to the order of AVN ACQUISITION CORP., having an address of 497 Delaware
Avenue, Buffalo, New York 14202 (the “Lender”), the principal sum of Three Hundred Fifty Thousand and no/100 dollars ($350,000.00) (All monetary amounts herein are expressed in U.S. Dollars). Principal on this Note shall be payable on
May 31, 2006, or such earlier date as the Borrower shall complete its proposed merger with Lender (“Maturity”). Interest on the outstanding principal amount shall accrue at the rate of eight percent (8%) per annum, payable on
December 31, for so long as this Note shall remain outstanding, and at Maturity. 
  
 The Borrower shall have the option of prepaying the unpaid portion of such principal sum in full or part at any time or from time to time without any premium or penalty, provided that upon prepaying such unpaid
portion in full the Borrower shall pay to the Lender all interest and other amounts owing pursuant to this Note but not yet paid. 
  
 All amounts owing pursuant to this Note but not yet paid shall, without any notice, demand, presentment or protest of any kind, automatically become
immediately due if the Borrower commences or has commenced against it any bankruptcy or insolvency proceeding. All amounts owing pursuant to this Note but not yet paid shall, without any notice, demand, presentment or protest of any kind, become
immediately due at the sole option of the Lender if (1) any amount owing pursuant to this Note is not paid when due, (2) the Borrower is dissolved, or becomes insolvent (however such insolvency is evidenced), or (3) there occurs or
exists any material event or condition of default for purposes of any security agreement, mortgage or other agreement now or hereafter in effect between the Lender and the Borrower. 
  
 All payments under this Note are to be made to the Lender at the Lender’s address referenced above or at such other
address as the Lender may from time to time designate in writing. 
  
 The Borrower promises to pay reasonable costs and expenses incurred by the Lender in collecting this Note and enforcing the Lender’s rights hereunder, including, but not limited to, the reasonable fees and disbursements of legal
counsel to the Lender. 
  
 Failure or delay by the Lender in
exercising, or a single or partial exercise of, any power or right hereunder shall not operate as a waiver thereof or of any other power or right or preclude any other future exercise of that or any other power or right. A waiver of any power or

 right hereunder shall be in writing, shall be limited to the specific instance and shall not be deemed a waiver of the
subject power or right in the future or a waiver of any other power or right. 
  
 This Note may not be modified or terminated orally or by any course of conduct but only by an agreement in writing duly executed by the Borrower and the Lender. 
  
 This Note shall be governed by and construed, interpreted and enforced in
accordance with the internal law of the State of Delaware, without regard to principles of conflict of laws. 
  

			
	AVICENA GROUP, INC.
		
	By:	 	/s/    Belinda Tsao Nivaggioli
	Its:	 	Chief Executive OfficerStaktek Holdings, Inc. 2003 Stock Option plan, as amended to date.

 Exhibit 10.1 
  
 STAKTEK HOLDINGS, INC. 
 AMENDED AND RESTATED 
 2003 STOCK OPTION PLAN 
  
 As amended on November 10, 2003 
 and August 8, 2005 
 (and split
adjusted on January 16, 2004) 
  
 1. Establishment, Purpose and
Term of Plan. 
  
 1.1
Establishment. The Staktek Holdings, Inc. 2003 Stock Option Plan (the “Plan”) is hereby established effective as of July 7, 2003 and is amended effective as of November 10, 2003.

  
 1.2 Purpose. The purpose of the
Plan is to advance the interests of the Participating Company Group and its stockholders by providing an incentive to attract and retain persons performing services for the Participating Company Group and by motivating such persons to contribute to
the growth and profitability of the Participating Company Group. 
  
 1.3 Term of Plan. The Plan shall continue in effect until the earlier of its termination by the Board or the date on which all of the shares of Stock available for issuance under the Plan have been issued and all restrictions
on such shares under the terms of the Plan and the agreements evidencing Options granted under the Plan have lapsed. However, all Options shall be granted, if at all, within ten (10) years from the earlier of the date the Plan is adopted by the
Board or the date the Plan is duly approved by the stockholders of the Company. 
  
 2. Definitions and Construction. 
  
 2.1 Definitions. Whenever used herein, the following terms shall have their respective meanings set forth below: 
  
 (a) “Board” means the Board of Directors of the Company. If one or more Committees have been
appointed by the Board to administer the Plan, “Board” also means such Committee(s). 
  
 (b) “Cause” shall mean any of the following: (i) the Optionee’s theft of Company property
or falsification of any Participating Company documents or records; (ii) the Optionee’s improper use or disclosure of a Participating Company’s confidential or proprietary information; (iii) any action by the Optionee which has a
detrimental effect on a Participating Company’s reputation or business; (iv) the Optionee’s failure or inability to perform any reasonable assigned duties or the breach by Optionee of any duties to the Company or its stocholders;
(v) any breach by the Optionee of any employment or service agreement between the Optionee and a Participating Company; or (vi) the Optionee’s conviction (including any plea of guilty or no contest) of any felony, criminal fraud,
theft or crime of moral turpitude. 
  
 (c)
“Code” means the Internal Revenue Code of 1986, as amended, and any applicable regulations promulgated thereunder. 
  
 (d) “Committee” means the Compensation Committee or other committee of the Board duly
appointed to administer the Plan and having such powers as shall be specified by the Board. Unless the powers of the Committee have been specifically limited, the Committee shall have all of the powers of the Board granted herein, including, without
limitation, the power to amend or terminate the Plan at any time, subject to the terms of the Plan and any applicable limitations imposed by law. 
  

 1 

 (e) “Company” means Staktek Holdings, Inc.,
a Delaware corporation, or any successor corporation thereto. 
  
 (f) “Consultant” means a person engaged to provide consulting or advisory services (other than as an Employee or a Director) to a Participating Company, provided that the
identity of such person, the nature of such services or the entity to which such services are provided would not preclude the Company from offering or selling securities to such person pursuant to the Plan in reliance on either the exemption from
registration provided by Rule 701 under the Securities Act or, if the Company is required to file reports pursuant to Section 13 or 15(d) of the Exchange Act, registration on a Form S-8 Registration Statement under the Securities Act.

  
 (g)
“Director” means a member of the Board or of the board of directors of any other Participating Company. 
  
 (h) “Disability” means the permanent and total disability of the Optionee within the meaning
of Section 22(e)(3) of the Code. 
  
 (i) “Employee” means any person treated as an employee (including an officer or a Director who is also treated as an employee) in the records of a Participating Company and, with respect to any
Incentive Stock Option granted to such person, who is an employee for purposes of Section 422 of the Code; provided, however, that neither service as a Director nor payment of a director’s fee shall be sufficient to constitute employment
for purposes of the Plan. 
  
 (j)
“Exchange Act” means the Securities Exchange Act of 1934, as amended. 
  
 (k) “Fair Market Value” means, as of any date, the value of a share of Stock or other
property as determined by the Board, in its discretion, or by the Company, in its discretion, if such determination is expressly allocated to the Company herein, subject to the following: 
  
 (i) If, on such date, the Stock is listed on a
national or regional securities exchange or market system, the Fair Market Value of a share of Stock shall be the closing price of a share of Stock (or the mean of the closing bid and asked prices of a share of Stock if the Stock is so quoted
instead) as quoted on the Nasdaq National Market, The Nasdaq SmallCap Market or such other national or regional securities exchange or market system constituting the primary market for the Stock, as reported in The Wall Street Journal or such
other source as the Company deems reliable. If the relevant date does not fall on a day on which the Stock has traded on such securities exchange or market system, the date on which the Fair Market Value shall be established shall be the last day on
which the Stock was so traded prior to the relevant date, or such other appropriate day as shall be determined by the Board, in its discretion. 
  
 (ii) If, on such date, the Stock is not listed on a national or regional securities exchange or market system, the Fair Market
Value of a share of Stock shall be as determined by the Board in good faith without regard to any restriction other than a restriction which, by its terms, will never lapse. 
  
 (l) “Incentive Stock Option” means an Option intended to be (as
set forth in the Option Agreement) and which qualifies as an incentive stock option within the meaning of Section 422(b) of the Code. 
  
 (m) “Insider” means an officer or a Director of the Company or any other person whose
transactions in Stock are subject to Section 16 of the Exchange Act. 
  

 2 

 (n) “Nonstatutory Stock Option” means an
Option not intended to be (as set forth in the Option Agreement) or which does not qualify as an Incentive Stock Option. 
  
 (o) “Option” means a right to purchase Stock (subject to adjustment as provided in
Section 4.2) pursuant to the terms and conditions of the Plan. An Option may be either an Incentive Stock Option or a Nonstatutory Stock Option. 
  
 (p) “Option Agreement” means a written agreement between the Company and an Optionee setting
forth the terms, conditions and restrictions of the Option granted to the Optionee and any shares acquired upon the exercise thereof. An Option Agreement may consist of a form of “Notice of Grant of Stock Option” and a form of “Stock
Option Agreement” incorporated therein by reference, or such other form or forms as the Board may approve from time to time. 
  
 (q) “Optionee” means a person who has been granted one or more Options. 
  
 (r) “Parent
Corporation” means any present or future “parent corporation” of the Company, as defined in Section 424(e) of the Code. 
  
 (s) “Participating Company” means the Company or any Parent Corporation or Subsidiary
Corporation. 
  
 (t)
“Participating Company Group” means, at any point in time, all corporations collectively which are then Participating Companies. 
  
 (u) “Rule 16b-3” means Rule 16b-3 under the Exchange Act,
as amended from time to time, or any successor rule or regulation. 
  
 (v) “Securities Act” means the Securities Act of 1933, as amended. 
  
 (w) “Service” means an Optionee’s employment or service with the Participating Company
Group, whether in the capacity of an Employee, a Director or a Consultant. An Optionee’s Service shall not be deemed to have terminated merely because of a change in the capacity in which the Optionee renders Service to the Participating
Company Group or a change in the Participating Company for which the Optionee renders such Service, provided that there is no interruption or termination of the Optionee’s Service. Furthermore, an Optionee’s Service with the Participating
Company Group shall not be deemed to have terminated if the Optionee takes any military leave, sick leave, or other bona fide leave of absence approved by the Company; provided, however, that if any such leave exceeds ninety (90) days, on the
ninety-first (91st) day of such leave the Optionee’s Service shall be deemed to have terminated unless the Optionee’s right to return to Service with the Participating Company Group is guaranteed by statute or contract.
Notwithstanding the foregoing, unless otherwise designated by the Company or required by law, a leave of absence shall not be treated as Service for purposes of determining vesting under the Optionee’s Option Agreement. The Optionee’s
Service shall be deemed to have terminated either upon an actual termination of Service or upon the corporation for which the Optionee performs Service ceasing to be a Participating Company. Subject to the foregoing, the Company, in its discretion,
shall determine whether the Optionee’s Service has terminated and the effective date of such termination. 
  
 (x) “Stock” means the common stock of the Company, as adjusted from time to time in
accordance with Section 4.2. 
  
 (y) “Subsidiary Corporation” means any present or future “subsidiary corporation” of the Company, as defined in Section 424(f) of the Code. 
  

 3 

 (z) “Ten Percent Owner Optionee” means an
Optionee who, at the time an Option is granted to the Optionee, owns stock possessing more than ten percent (10%) of the total combined voting power of all classes of stock of a Participating Company within the meaning of Section 422(b)(6)
of the Code. 
  
 2.2 Construction. Captions and
titles contained herein are for convenience only and shall not affect the meaning or interpretation of any provision of the Plan. Except when otherwise indicated by the context, the singular shall include the plural and the plural shall include the
singular. Use of the term “or” is not intended to be exclusive, unless the context clearly requires otherwise. 
  
 3. Administration. 
  
 3.1 Administration by the Board. The Plan shall be administered by the Board. All questions of interpretation of the Plan or of any Option
shall be determined by the Board, and such determinations shall be final and binding upon all persons having an interest in the Plan or such Option. 
  
 3.2 Authority of Officers. Any officer of a Participating Company shall have the authority to act on behalf of the Company with respect to
any matter, right, obligation, determination or election which is the responsibility of or which is allocated to the Company herein, provided the officer has apparent authority with respect to such matter, right, obligation, determination or
election. 
  
 3.3 Powers of the Board.
In addition to any other powers set forth in the Plan and subject to the provisions of the Plan, the Board shall have the full and final power and authority, in its discretion: 
  
 (a) to determine the persons to whom, and the time or times at which, Options shall be granted and
the number of shares of Stock to be subject to each Option; 
  
 (b) to designate Options as Incentive Stock Options or Nonstatutory Stock Options; 
  
 (c) to determine the Fair Market Value of shares of Stock or other property; 
  
 (d) to determine the terms, conditions and
restrictions applicable to each Option (which need not be identical) and any shares acquired upon the exercise thereof, including, without limitation, (i) the exercise price of the Option, (ii) the method of payment for shares purchased
upon the exercise of the Option, (iii) the method for satisfaction of any tax withholding obligation arising in connection with the Option or such shares, including by the withholding or delivery of shares of stock, (iv) the timing, terms
and conditions of the exercisability of the Option or the vesting of any shares acquired upon the exercise thereof, (v) the time of the expiration of the Option, (vi) the effect of the Optionee’s termination of Service with the
Participating Company Group on any of the foregoing, and (vii) all other terms, conditions and restrictions applicable to the Option or such shares not inconsistent with the terms of the Plan; 
  
 (e) to approve one or more forms of Option Agreement;

  
 (f) to amend, modify, extend, cancel
or renew any Option or to waive any restrictions or conditions applicable to any Option or any shares acquired upon the exercise thereof; 
  
 (g) to accelerate, continue, extend or defer the exercisability of any Option or the vesting of any shares acquired upon the
exercise thereof, including with respect to the period following an Optionee’s termination of Service with the Participating Company Group; 
  
 (h) to prescribe, amend or rescind rules, guidelines and policies relating to the Plan, or to adopt supplements to, or alternative
versions of, the Plan, including, without limitation, as the Board 

  

 4 

 
deems necessary or desirable to comply with the laws of, or to accommodate the tax policy or custom of, foreign jurisdictions whose citizens may be granted
Options; and 
  
 (i) to correct any
defect, supply any omission or reconcile any inconsistency in the Plan or any Option Agreement and to make all other determinations and take such other actions with respect to the Plan or any Option as the Board may deem advisable to the extent not
inconsistent with the provisions of the Plan or applicable law. 
  
 3.4 Administration with Respect to Insiders. With respect to participation by Insiders in the Plan, at any time that any class of equity security of the Company is registered pursuant to Section 12 of the Exchange Act,
the Plan shall be administered in compliance with the requirements, if any, of Rule 16b-3. 
  
 3.5 Indemnification. In addition to such other rights of indemnification as they may have as members of the Board or officers or employees
of the Participating Company Group, members of the Board and any officers or employees of the Participating Company Group to whom authority to act for the Board or the Company is delegated shall be indemnified by the Company against all reasonable
expenses, including attorneys’ fees, actually and necessarily incurred in connection with the defense of any action, suit or proceeding, or in connection with any appeal therein, to which they or any of them may be a party by reason of any
action taken or failure to act under or in connection with the Plan, or any right granted hereunder, and against all amounts paid by them in settlement thereof (provided such settlement is approved by independent legal counsel selected by the
Company) or paid by them in satisfaction of a judgment in any such action, suit or proceeding, except in relation to matters as to which it shall be adjudged in such action, suit or proceeding that such person is liable for gross negligence, bad
faith or intentional misconduct in duties; provided, however, that within sixty (60) days after the institution of such action, suit or proceeding, such person shall offer to the Company, in writing, the opportunity at its own expense to handle
and defend the same. 
  
 4. Shares Subject to Plan. 
  
 4.1 Maximum Number of Shares Issuable. Subject to adjustment
as provided in Section 4.2, the maximum aggregate number of shares of Stock that may be issued under the Plan shall be eleven million thirty thousand (11,030,000) and shall consist of authorized but unissued or reacquired shares of
Stock or any combination thereof. If an outstanding Option for any reason expires or is terminated or canceled or if shares of Stock are acquired upon the exercise of an Option subject to a Company repurchase option and are repurchased by the
Company at the Optionee’s exercise price, the shares of Stock allocable to the unexercised portion of such Option or such repurchased shares of Stock shall again be available for issuance under the Plan. 
  
 4.2 Adjustments for Changes in Capital Structure.
In the event of any stock dividend, stock split, reverse stock split, recapitalization, combination, reclassification or similar change in the capital structure of the Company, appropriate adjustments shall be made in the number and class of shares
subject to the Plan and to any outstanding Options and in the exercise price per share of any outstanding Options. If a majority of the shares which are of the same class as the shares that are subject to outstanding Options are exchanged for,
converted into, or otherwise become (whether or not pursuant to an Ownership Change Event, as defined in Section 8.1) shares of another corporation (the “New Shares”), the Board may unilaterally
amend the outstanding Options to provide that such Options are exercisable for New Shares. In the event of any such amendment, the number of shares subject to, and the exercise price per share of, the outstanding Options shall be adjusted in a fair
and equitable manner as determined by the Board, in its discretion. Notwithstanding the foregoing, any fractional share resulting from an adjustment pursuant to this Section 4.2 shall be rounded down to the nearest whole number, and in
no event may the exercise price of any Option be decreased to an amount less than the par value, if any, 

  

 5 

 
of the stock subject to the Option. The adjustments determined by the Board pursuant to this Section 4.2 shall be final, binding and conclusive.

  
 5. Eligibility and Option Limitations. 
  
 5.1 Persons Eligible for Options. Options may be
granted only to Employees, Consultants, and Directors. For purposes of the foregoing sentence, “Employees,” “Consultants” and “Directors” shall include prospective Employees, prospective Consultants and prospective
Directors to whom Options are granted in connection with written offers of an employment or other service relationship with the Participating Company Group. Eligible persons may be granted more than one (1) Option. 
  
 5.2 Option Grant Restrictions. Any person who is
not an Employee on the effective date of the grant of an Option to such person may be granted only a Nonstatutory Stock Option. An Incentive Stock Option granted to a prospective Employee upon the condition that such person become an Employee shall
be deemed granted effective on the date such person commences Service with a Participating Company, with an exercise price determined as of such date in accordance with Section 6.1. 
  
 5.3 Fair Market Value Limitation. To the extent
that options designated as Incentive Stock Options (granted under all stock option plans of the Participating Company Group, including the Plan) become exercisable by an Optionee for the first time during any calendar year for stock having a Fair
Market Value greater than One Hundred Thousand Dollars ($100,000), the portions of such options which exceed such amount shall be treated as Nonstatutory Stock Options. For purposes of this Section 5.3, options designated as Incentive
Stock Options shall be taken into account in the order in which they were granted, and the Fair Market Value of stock shall be determined as of the time the option with respect to such stock is granted. If the Code is amended to provide for a
different limitation from that set forth in this Section 5.3, such different limitation shall be deemed incorporated herein effective as of the date and with respect to such Options as required or permitted by such amendment to the Code.
If an Option is treated as an Incentive Stock Option in part and as a Nonstatutory Stock Option in part by reason of the limitation set forth in this Section 5.3, the Optionee may designate which portion of such Option the Optionee is
exercising. In the absence of such designation, the Optionee shall be deemed to have exercised the Incentive Stock Option portion of the Option first. Separate certificates representing each such portion shall be issued upon the exercise of the
Option. 
  
 6. Terms and Conditions of Options. 
  
 Options shall be evidenced by Option Agreements specifying the number of
shares of Stock covered thereby, in such form as the Board shall from time to time establish. No Option or purported Option shall be a valid and binding obligation of the Company unless evidenced by a fully executed Option Agreement. Option
Agreements may incorporate all or any of the terms of the Plan by reference and shall comply with and be subject to the following terms and conditions: 
  
 6.1 Exercise Price. The exercise price for each Option shall be established in the discretion of the Board; provided, however,
that (a) the exercise price per share for an Option shall be not less than the Fair Market Value of a share of Stock on the effective date of grant of the Option, and (b) no Incentive Stock Option granted to a Ten Percent Owner Optionee
shall have an exercise price per share less than one hundred ten percent (110%) of the Fair Market Value of a share of Stock on the effective date of grant of the Option. Notwithstanding the foregoing, an Option (whether an Incentive Stock
Option or a Nonstatutory Stock Option) may be granted with an exercise price lower than the minimum exercise price set forth above if such Option is granted pursuant to an assumption or substitution for another option in a manner qualifying under
the provisions of Section 424(a) of the Code. 
  
 6.2
Exercisability and Term of Options. Options shall be exercisable at such time or times, or upon such event or events, and subject to such terms, conditions, performance criteria and restrictions 

  

 6 

 
as shall be determined by the Board and set forth in the Option Agreement evidencing such Option; provided, however, that (a) no Option shall be
exercisable after the expiration of ten (10) years after the effective date of grant of such Option, (b) no Incentive Stock Option granted to a Ten Percent Owner Optionee shall be exercisable after the expiration of five (5) years
after the effective date of grant of such Option, and (c) no Option granted to a prospective Employee, prospective Consultant or prospective Director may become exercisable prior to the date on which such person commences Service with a
Participating Company. Subject to the foregoing, unless otherwise specified by the Board in the grant of an Option, any Option granted hereunder shall terminate ten (10) years after the effective date of grant of the Option, unless earlier
terminated in accordance with its provisions. 
  
 6.3 Payment
of Exercise Price. 
  
 (a) Forms
of Consideration Authorized. Except as otherwise provided below, payment of the exercise price for the number of shares of Stock being purchased pursuant to any Option shall be made (i) in cash, by check or cash equivalent, (ii) by
tender to the Company, or attestation to the ownership, of shares of Stock owned by the Optionee having a Fair Market Value (as determined by the Company without regard to any restrictions on transferability applicable to such stock by reason of
federal or state securities laws or agreements with an underwriter for the Company) not less than the exercise price, (iii) by delivery of a properly executed notice together with irrevocable instructions to a broker providing for the
assignment to the Company of the proceeds of a sale or loan with respect to some or all of the shares being acquired upon the exercise of the Option (including, without limitation, through an exercise complying with the provisions of
Regulation T as promulgated from time to time by the Board of Governors of the Federal Reserve System) (a “Cashless Exercise”), (iv) provided that the Optionee is an Employee and in the Company’s
sole discretion at the time the Option is exercised, by delivery of the Optionee’s promissory note in a form approved by the Company for the aggregate exercise price, provided that, if the Company is incorporated in the State of Delaware, the
Optionee shall pay in cash that portion of the aggregate exercise price not less than the par value of the shares being acquired, (v) by such other consideration as may be approved by the Board from time to time to the extent permitted by
applicable law, or (vi) by any combination thereof. The Board may at any time or from time to time, by approval of or by amendment to the standard forms of Option Agreement described in Section 7, or by other means, grant Options
which do not permit all of the foregoing forms of consideration to be used in payment of the exercise price or which otherwise restrict one or more forms of consideration. 
  
 (b) Limitations on Forms of Consideration. 
  
 (i) Tender of Stock. Notwithstanding the
foregoing, an Option may not be exercised by tender to the Company, or attestation to the ownership, of shares of Stock to the extent such tender or attestation would constitute a violation of the provisions of any law, regulation or agreement
restricting the redemption of the Company’s stock. Unless otherwise provided by the Board, an Option may not be exercised by tender to the Company, or attestation to the ownership, of shares of Stock unless such shares either have been owned by
the Optionee for more than six (6) months or were not acquired, directly or indirectly, from the Company. 
  
 (ii) Cashless Exercise. The Company reserves, at any and all times, the right, in the Company’s sole and absolute
discretion, to establish, decline to approve or terminate any program or procedures for the exercise of Options by means of a Cashless Exercise. 
  
 (iii) Payment by Promissory Note. No promissory note shall be permitted if the exercise of an Option using a promissory note
would be a violation of any law. Any permitted promissory note shall be on such terms as the Board shall determine at the time the Option is granted. The Board shall have the authority to permit or require the Optionee to secure any promissory note
used to exercise an Option with the shares of Stock acquired upon the exercise of the Option or with other 

  

 7 

 
collateral acceptable to the Company. Unless otherwise provided by the Board, if the Company at any time is subject to the regulations promulgated by the
Board of Governors of the Federal Reserve System or any other governmental entity affecting the extension of credit in connection with the Company’s securities, any promissory note shall comply with such applicable regulations, and the Optionee
shall pay the unpaid principal and accrued interest, if any, to the extent necessary to comply with such applicable regulations. 
  
 6.4 Tax Withholding. The Company shall have the right, but not the obligation, to deduct from the shares of Stock issuable
upon the exercise of an Option, or to accept from the Optionee the tender of, a number of whole shares of Stock having a Fair Market Value, as determined by the Company, equal to all or any part of the federal, state, local and foreign taxes, if
any, required by law to be withheld by the Participating Company Group with respect to such Option or the shares acquired upon the exercise thereof. Alternatively or in addition, in its discretion, the Company shall have the right to require the
Optionee, through payroll withholding, cash payment or otherwise, including by means of a Cashless Exercise, to make adequate provision for any such tax withholding obligations of the Participating Company Group arising in connection with the Option
or the shares acquired upon the exercise thereof. The Fair Market Value of any shares of Stock withheld or tendered to satisfy any such tax withholding obligations shall not exceed the amount determined by the applicable minimum statutory
withholding rates. The Company shall have no obligation to deliver shares of Stock or to release shares of Stock from an escrow established pursuant to the Option Agreement until the Participating Company Group’s tax withholding obligations
have been satisfied by the Optionee. 
  
 6.5 Repurchase
Rights. Shares issued under the Plan may be subject to a right of first refusal, one or more repurchase options, or other conditions and restrictions as determined by the Board in its discretion at the time the Option is granted.
The Company shall have the right to assign at any time any repurchase right it may have, whether or not such right is then exercisable, to one or more persons as may be selected by the Company. Upon request by the Company, each Optionee shall
execute any agreement evidencing such transfer restrictions prior to the receipt of shares of Stock hereunder and shall promptly present to the Company any and all certificates representing shares of Stock acquired hereunder for the placement on
such certificates of appropriate legends evidencing any such transfer restrictions. 
  
 6.6 Effect of Termination of Service. 
  
 (a) Option Exercisability. Subject to earlier termination of the Option as otherwise provided herein and unless otherwise provided by the Board in the grant of an Option and set forth in
the Option Agreement, an Option shall be exercisable after an Optionee’s termination of Service only during the applicable time period determined in accordance with this Section 6.6 and thereafter shall terminate: 
  
 (i) Disability. If the Optionee’s Service
with the Participating Company Group terminates because of the Disability of the Optionee, the Option, to the extent unexercised and exercisable on the date on which the Optionee’s Service terminated, may be exercised by the Optionee (or the
Optionee’s guardian or legal representative) at any time prior to the expiration of twelve (12) months (or such other period of time as determined by the Board, in its discretion) after the date on which the Optionee’s Service
terminated, but in any event no later than the date of expiration of the Option’s term as set forth in the Option Agreement evidencing such Option (the “Option Expiration Date”). 
  
 (ii) Death. If the Optionee’s Service
with the Participating Company Group terminates because of the death of the Optionee, the Option, to the extent unexercised and exercisable on the date on which the Optionee’s Service terminated, may be exercised by the Optionee’s legal
representative or other person who acquired the right to exercise the Option by reason of the Optionee’s death at any time prior to the expiration of twelve (12) months (or such other period of time as determined by the Board, in its
discretion) after the date on which the Optionee’s Service terminated, but in any event no later than the Option Expiration Date. The Optionee’s Service shall be deemed to have terminated on 

  

 8 

 
account of death if the Optionee dies within three (3) months (or such other period of time as determined by the Board, in its discretion) after the
Optionee’s termination of Service (unless the termination was for Cause). 
  
 (iii) Cause. If the Optionee’s Service with the Participating Company Group is terminated for Cause, the Option shall
terminate and cease to be exercisable immediately upon such termination of Service. 
  
 (iv) Other Termination of Service. If the Optionee’s Service with the Participating Company Group terminates for any
reason, except Disability, death or Cause, the Option, to the extent unexercised and exercisable by the Optionee on the date on which the Optionee’s Service terminated, may be exercised by the Optionee at any time prior to the expiration of
three (3) months (or such other period of time as determined by the Board, in its discretion) after the date on which the Optionee’s Service terminated, but in any event no later than the Option Expiration Date. 
  
 (b) Extension if Exercise Prevented by
Law. Notwithstanding the foregoing, if the exercise of an Option within the applicable time periods set forth in Section 6.6(a) is prevented by the provisions of Section 10 below, the Option shall remain
exercisable until three (3) months (or such longer period of time as determined by the Board, in its discretion) after the date the Optionee is notified by the Company that the Option is exercisable, but in any event no later than the Option
Expiration Date. 
  
 (c) Extension
if Optionee Subject to Section 16(b). Notwithstanding the foregoing, if a sale within the applicable time periods set forth in Section 6.6(a) of shares acquired upon the exercise of the Option would subject the
Optionee to suit under Section 16(b) of the Exchange Act, the Option shall remain exercisable until the earliest to occur of (i) the tenth (10th) day following the date on which a sale of such shares by the Optionee would no longer be
subject to such suit, (ii) the one hundred and ninetieth (190th) day after the Optionee’s termination of Service, or (iii) the Option Expiration Date. 
  
 6.7 Transferability of Options. During the lifetime of the Optionee, an Option shall be exercisable only by
the Optionee or the Optionee’s guardian or legal representative. No Option shall be assignable or transferable by the Optionee, except by will or by the laws of descent and distribution. Notwithstanding the foregoing, to the extent permitted by
the Board, in its discretion, and set forth in the Option Agreement evidencing such Option, a Nonstatutory Stock Option shall be assignable or transferable subject to the applicable limitations, if any, described in Rule 701 under the Securities
Act, and the General Instructions to Form S-8 Registration Statement under the Securities Act. 
  
 7. Standard Forms of Option Agreement. 
  
 7.1 Option Agreement. Unless otherwise provided by the Board at the time the Option is granted, an Option shall comply with and be subject to the terms and conditions set forth in the form
of Option Agreement approved by the Board concurrently with its adoption of the Plan and as amended from time to time. 
  
 7.2 Authority to Vary Terms. The Board shall have the authority from time to time to vary the terms of any standard form of
Option Agreement described in this Section 7 either in connection with the grant or amendment of an individual Option or in connection with the authorization of a new standard form or forms. 
  

 9 

 8. Change in Control. 
  
 8.1 Definitions. 
  
 (a) An “Ownership Change Event” shall be deemed to have occurred if any of the following
occurs with respect to the Company: (i) the direct or indirect sale or exchange in a single or series of related transactions by the stockholders of the Company of more than fifty percent (50%) of the voting stock of the Company;
(ii) a merger or consolidation in which the Company is a party; (iii) the sale, exchange, or transfer of all or substantially all of the assets of the Company; or (iv) a liquidation or dissolution of the Company. 
  
 (b) A “Change in
Control” shall mean an Ownership Change Event or a series of related Ownership Change Events (collectively, a “Transaction”) wherein the stockholders of the Company immediately before the
Transaction do not retain immediately after the Transaction, in substantially the same proportions as their ownership of shares of the Company’s voting stock immediately before the Transaction, direct or indirect beneficial ownership of more
than fifty percent (50%) of the total combined voting power of the outstanding voting stock of the Company or the corporation or corporations to which the assets of the Company were transferred (the “Transferee
Corporation(s)”), as the case may be. For purposes of the preceding sentence, indirect beneficial ownership shall include, without limitation, an interest resulting from ownership of the voting stock of one or more corporations
which, as a result of the Transaction, own the Company or the Transferee Corporation(s), as the case may be, either directly or through one or more subsidiary corporations. The Board shall have the right to determine whether multiple sales or
exchanges of the voting stock of the Company or multiple Ownership Change Events are related, and its determination shall be final, binding and conclusive. 
  
 8.2 Effect of Change in Control on Options. In the event of a Change in Control, the surviving, continuing, successor, or
purchasing corporation or parent corporation thereof, as the case may be (the “Acquiring Corporation”), may either assume the Company’s rights and obligations under outstanding Options or substitute for
outstanding Options substantially equivalent options for the Acquiring Corporation’s stock. In the event the Acquiring Corporation elects not to assume or substitute for outstanding Options in connection with a Change in Control, the
exercisability and vesting of each outstanding Option shall accelerate in full and shall become fully vested and exercisable as of the date ten (10) days prior to the date of the Change in Control, provided that the Optionee’s Service has
not terminated prior to such date. The exercise or vesting of any Option and the acquisition of any shares upon the exercise thereof that was permissible solely by reason of this Section 8.2 shall be conditioned upon the consummation of
the Change in Control. Any Options which are neither assumed or substituted for by the Acquiring Corporation in connection with the Change in Control nor exercised as of the date of the Change in Control shall terminate and cease to be outstanding
effective as of the date of the Change in Control. Notwithstanding the foregoing, shares acquired upon exercise of an Option prior to the Change in Control and any consideration received pursuant to the Change in Control with respect to such shares
shall continue to be subject to all applicable provisions of the Option Agreement evidencing such Option except as otherwise provided in such Option Agreement. 
  

9. Provision of Information. Each Optionee shall be given access to information concerning the Company equivalent to that information generally
made available to the Company’s common stockholders. 
  
 10.
Compliance with Securities Law. The grant of Options and the issuance of shares of Stock upon exercise of Options shall be subject to compliance with all applicable requirements of federal, state and foreign law with respect to such
securities. Options may not be exercised if the issuance of shares of Stock upon exercise would constitute a violation of any applicable federal, state or foreign securities laws or other law or regulations or the requirements of any stock exchange
or market system upon which the 

  

 10 

 
Stock may then be listed. In addition, no Option may be exercised unless (a) a registration statement under the Securities Act shall at the time of
exercise of the Option be in effect with respect to the shares issuable upon exercise of the Option or (b) in the opinion of legal counsel to the Company, the shares issuable upon exercise of the Option may be issued in accordance with the
terms of an applicable exemption from the registration requirements of the Securities Act. The inability of the Company to obtain from any regulatory body having jurisdiction the authority, if any, deemed by the Company’s legal 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. As a condition to
the exercise of any Option, the Company may require the Optionee to satisfy any qualifications that may be necessary or appropriate, to evidence compliance with any applicable law or regulation and to make any representation or warranty with respect
thereto as may be requested by the Company. 
  
 11. Termination or
Amendment of Plan. The Board may terminate or amend the Plan at any time. However, subject to changes in applicable law, regulations or rules that would permit otherwise, without the approval of the Company’s stockholders, there shall
be (a) no increase in the maximum aggregate number of shares of Stock that may be issued under the Plan (except by operation of the provisions of Section 4.2), (b) no change in the class of persons eligible to receive Incentive
Stock Options, and (c) no other amendment of the Plan that would require approval of the Company’s stockholders under any applicable law, regulation or rule. No termination or amendment of the Plan shall affect any then outstanding Option
unless expressly provided by the Board. In any event, no termination or amendment of the Plan may adversely affect any then outstanding Option without the consent of the Optionee, unless such termination or amendment is required to enable an Option
designated as an Incentive Stock Option to qualify as an Incentive Stock Option or is necessary to comply with any applicable law, regulation or rule. 
  
 12. Stockholder Approval. The Plan or any increase in the maximum aggregate number of shares of Stock issuable thereunder as provided in
Section 4.1 (the “Authorized Shares”) shall be approved by the stockholders of the Company within twelve (12) months of the date of adoption thereof by the Board. Options granted prior to
stockholder approval of the Plan or in excess of the Authorized Shares previously approved by the stockholders shall become exercisable no earlier than the date of stockholder approval of the Plan or such increase in the Authorized Shares, as the
case may be. 
  

 11

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