First Amendment to Amended and Restated Employment Letter Agreement between the Company and Michael Kamarck, dated March 13, 2020

This Amendment, together with the Amended Offer Letter, any exhibits thereto, your CIIAA, the Severance Plan, and any documentation related to your equity interests, forms the complete and exclusive statement of your employment agreement with the Company. It supersedes any other agreements or promises made to you by anyone, whether oral or written. No term or provision of this Amendment may be amended waived, released, discharged or modified except in writing, signed by you and an authorized officer of the Company, except that the Company may, in its sole discretion, adjust salaries, incentive compensation, stock plans, benefits, job titles, locations, duties, responsibilities, and reporting relationships.   This Amendment will be governed by the laws of California.  If any provision of this Amendment is determined to be invalid or unenforceable, in whole or in part, this determination shall not affect any other provision of this Amendment and the provision in question shall be modified so as to be rendered enforceable in a manner consistent with the intent of the parties insofar as possible under applicable law.  This Amendment may be delivered and executed via facsimile, electronic mail (including pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, Uniform Electronic Transactions Act or other applicable law) or other transmission method and shall be deemed to have been duly and validly delivered and executed and be valid and effective for all purposes.