Final answer:
To ventilate an apneic and pulseless infant, use bag-mask ventilation to force air into their lungs.
Step-by-step explanation:
To ventilate an infant that is apneic (no breathing) and pulseless, you would need to provide artificial respiration. One way to do this is by using a technique called bag-mask ventilation. This involves squeezing on a balloon connected to a mask and placing the mask tightly over the infant's face to force air into their lungs. It is important to ensure a good seal around the mask to prevent air leakage.