The document provides instructions for performing CPR on adults, infants, and children. For adults, the steps are to check breathing, call 911, perform 30 chest compressions at 100/min, give 2 breaths, and repeat until help arrives. For infants, the steps are to tap their shoulder, give 30 gentle chest compressions at 100/min using 2-3 fingers, clear the airway, and give 2 gentle breaths. For children, the steps are to use the heel of one or two hands for 30 chest compressions at 100/min, clear the airway, and give 2 breaths until help arrives.