definiens: ), by and among the Corporation, the Founders ( as defined therein ) and the Investors(as defined therein ) as a thereunder, and, if the undersigned is also a and/or a and/or a thereunder, as a and/or as a and/or as a as the case may be, thereunder, ( iii ) that certain Third Amended and Restated Registration Rights Agreement datedas of the Effective Date ( the ), by and among the Corporation and the Investors ( as definedtherein ) as a thereunder, and, if the undersigned is also a and/or a and/or a thereunder, as a and/or as a and/or as a as the case may be, thereunder, ( iv ) that certain Third Amended and Restated Stock Restriction Agreement dated asof the Effective Date ( the ), by and among the Corporation, the Founders ( as defined therein)and the Investors ( as defined therein ) as a thereunder, and, if the undersigned is also a and/or a and/or a thereunder, as a and/or as a and/or as a, as the case may be, thereunder, and ( v ) that certain Amended and Restated Investor RightsAgreement dated as of the Effective Date ( the ), by and among the Corporation and the Investors(as defined therein ) as a thereunder, and, if the undersigned is also a and/or a and/or a thereunder, as a and/or as a and/or as a as the case may be, thereunder, and authorizes this signature page to be attached as a counterpart to the PurchaseAgreement, the Voting Agreement, the Registration Rights Agreement, the Stock Restriction Agreement and the InvestorRights Agreement, or counterparts thereof