George kent is a 54 year old widower with a history of chronic obstructive pulmonary disease and was rushed to the emergency department with increasing shortness of breath, pyrexia, and a productive cough with yellow-green sputum. he has difficulty in communicating because of his inability to complete a sentence. one of his sons, jacob, says he has been unwell for three days. upon examination, crackles and wheezes can be heard in the lower lobes; he has a tachycardia and a bounding pulse. measurement of arterial blood gas shows ph 7.3, paco2 68 mm hg, hco3 28 mmol/l, and pao2 60 mm hg. how would you interpret this?