When instructing a patient to use an incentive spirometer, y…

When instructing a patient to use an incentive spirometer, you should tell the patientI. “Put the mouthpiece in your mouth and inhale as quickly as possible until your lungs are full.”II. “Put the mouthpiece in your mouth and inhale slowly until your lungs are full.”III. “When your lungs are full, briefly hold your breath.”IV. “Put the mouthpiece into your mouth and blow hard.”