The arterial blood gas below indicates that the primary acid-base imbalance is: pH - 7.25 PaCO2 - 20 mm Hg HCO3- - 10 mEq/L Select all that apply: Normal range: pH = 7.35-7.45 PaCO2 = 36-44 mmHg HCO3- = 22-26 mEq/L