A client has a nasogastric (NG) tube placed during abdominal surgery. During postoperative convalescence, the nurse identifies that the client is manifesting a hand tremor, muscle twitching, and confusion. Which arterial blood gas values are consistent with metabolic alkalosis that the nurse should report to the healthcare provider? Reference Range: pH [7.35 to 7.45] PCO, [35 to 45 mm Hg] HCO, [21 to 28 mEq/L (21 to 28 mmol/L)] PO2 [80 to 100 mm Hg]