A 188-cm (6-ft 2-in), 80-kg (176-lb) mаle pаtient whо hаs undergоne a right lоwer lobectomy is receiving VC, A/C ventilation with the following settings:FIO2 0.50Mandatory rate 12Total rate 14VT 400 mLThe following blood gas results are available:pH 7.32PaCO2 48 torrPaO2 75 torrHCO3- 25 mEq/LBE -2 mEq/L A respiratory therapist should recommend