CUSIP No. 985510106

EXHIBIT A

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13D to which this Agreement is annexed as Exhibit A, and any amendments thereto, is and will be filed on behalf of each of them in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated: July 31, 2023

MFN PARTNERS, LP
By:	/s/ Jonathan Reisman
Name: Jonathan Reisman
Title: Authorized Person
MFN PARTNERS GP, LLC
By:	/s/ Jonathan Reisman
Name: Jonathan Reisman
Title: Authorized Person
MFN PARTNERS MANAGEMENT, LP
By:	/s/ Jonathan Reisman
Name: Jonathan Reisman
Title: Authorized Person
MFN PARTNERS MANAGEMENT, LLC
By:	/s/ Jonathan Reisman
Name: Jonathan Reisman
Title: Authorized Person
FARHAD NANJI
/s/ Farhad Nanji
Farhad Nanji, individually
MICHAEL F. DEMICHELE
/s/ Michael F. DeMichele
Michael F. DeMichele, individually

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