respect to the Convertible Senior Notes due 2024, (viii) the additional letter agreement, dated
June 13, 2019, between the Company and Goldman Sachs & Co. LLC, with respect to the Convertible Senior Notes due 2024, (ix) the letter agreement confirmation, dated June 11, 2019, between the Company and Morgan Stanley &
Co. LLC, with respect to the Convertible Senior Notes due 2024, (x) the letter agreement, dated June 11, 2019, between the Company and Morgan Stanley & Co. LLC, with respect to the Convertible Senior Notes due 2024, (xi) the additional
letter agreement confirmation, dated June 13, 2019, between the Company and Morgan Stanley & Co. LLC, with respect to the Convertible Senior Notes due 2024, and (xii) the additional letter agreement, dated June 13, 2019,
between the Company and Morgan Stanley & Co. LLC, with respect to the Convertible Senior Notes due 2024, and (b)(i) the letter agreement confirmation, dated December 14, 2020, between the Company and Barclays Bank PLC, through its
agent Barclays Capital Inc., with respect to the Convertible Senior Notes due 2026, (ii) the letter agreement, dated December 14, 2020, between the Company and Barclays Bank PLC, through its agent Barclays Capital Inc., with respect to the
Convertible Senior Notes due 2026, (iii) the additional letter agreement confirmation, dated December 15, 2020, between the Company and Barclays Bank PLC, through its agent Barclays Capital Inc., with respect to the Convertible Senior Notes due
2026, (iv) the additional letter agreement, dated December 15, 2020, between the Company and Barclays Bank PLC, through its agent Barclays Capital Inc., with respect to the Convertible Senior Notes due 2026, (v) the letter agreement
confirmation, dated December 14, 2020, between the Company, Bank of Montreal, acting as principal, and BMO Capital Markets Corp., acting as agent, with respect to the Convertible Senior Notes due 2026, (vi) the letter agreement, dated
December 14, 2020, between the Company, Bank of Montreal, acting as principal, and BMO Capital Markets Corp., acting as agent, with respect to the Convertible Senior Notes due 2026, (vii) the additional letter agreement confirmation, dated
December 15, 2020, between the Company, Bank of Montreal, acting as principal, and BMO Capital Markets Corp., acting as agent, with respect to the Convertible Senior Notes due 2026, (viii) the additional letter agreement, dated
December 15, 2020, between the Company, Bank of Montreal, acting as principal, and BMO Capital Markets Corp., acting as agent, with respect to the Convertible Senior Notes due 2026, (ix) the letter agreement confirmation, dated
December 14, 2020, among the Company, Deutsche Bank AG, London Branch, and Deutsche Bank Securities Inc., acting solely as agent, with respect to the Convertible Senior Notes due 2026, (x) the letter agreement, dated December 14, 2020,
among the Company, Deutsche Bank AG, London Branch, and Deutsche Bank Securities Inc., acting solely as agent, with respect to the Convertible Senior Notes due 2026, (xi) the additional letter agreement confirmation, dated December 15, 2020,
among the Company, Deutsche Bank AG, London Branch, and Deutsche Bank Securities Inc., acting solely as agent, with respect to the Convertible Senior Notes due 2026, (xii) the additional letter agreement, dated December 15, 2020, among the
Company, Deutsche Bank AG, London Branch, and Deutsche Bank Securities Inc., acting solely as agent, with respect to the Convertible Senior Notes due 2026, (xiii) the letter agreement confirmation, dated December 14, 2020, between the Company
and Goldman Sachs & Co. LLC, with respect to the Convertible Senior Notes due 2026, (xiv) the letter agreement, dated December 14, 2020, between the Company and Goldman Sachs & Co. LLC, with respect to the Convertible Senior
Notes due 2026, (xv) the additional letter agreement confirmation, dated December 15, 2020, between the Company and Goldman Sachs & Co. LLC, with respect to the Convertible Senior Notes due 2026, (xvi) the additional letter agreement,
dated December 15, 2020, between the Company and Goldman Sachs & Co. LLC, with respect to the Convertible Senior Notes due 2026, (xvii) the letter agreement confirmation, dated December 14, 2020, between the Company
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