Which findings would indicate that a client with Adult Respiratory Distress Syndrome (ARDS) is deteriorating?

PaO2 58mm Hg, heart rate 108 beats per minute.

PCO2 33mm Hg, respiratory rate 10 breaths per minute.

PCO2 47mm Hg, respiratory rate 32 breaths per minute.

PaO2 87mm Hg, heart rate 80 beats per minute.