CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-229714 and 333-229713) and Form S-8 (Nos. 333-261805, 333-255653, 333-237966, 333-237965, 333-237964, 333-237963, 333-231216 and 333-231215) of °ÙÃĵ¼º½ of our report dated February 11, 2022 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.
/s/ PricewaterhouseCoopers LLP
Pittsburgh, Pennsylvania
February 11, 2022