The Metallicity and Carbon-to-oxygen Ratio of the Ultrahot Jupiter WASP-76b from Gemini-S/IGRINS by Weiner Mansfield, M, Line, MR, Wardenier, JP, Brogi, M, Bean, JL, Beltz, H, Smith, P, Zalesky, JA, Batalha, N, Kempton, EM, Montet, BT, Owen, JE, Plavchan, P, Rauscher, E