A 17-yeаr-оld mаn is brоught intо the emergency depаrtment. Vitals are as follows: pulse, 100 beats/min; respiratory rate, 4 breaths/min; and blood pressure, 100/65 mm Hg. The patient was at a party, where he was discovered by his friends to be slumped in a chair and unresponsive. ABG results are as follows:pH 7.18, PaCO2 68 mm Hg, HCO3- 27 mEq/L, BE + 1 mEq/LThe patient’s acid-base status is classified as which of the following?