Final answer:
To relieve choking in an unresponsive infant, perform back blows and chest thrusts.
Step-by-step explanation:
To relieve choking in an unresponsive infant, you should perform back blows and chest thrusts. This involves placing the infant face down on your forearm, supporting their head with your hand, and delivering back blows between their shoulder blades with the heel of your other hand. After that, you should give chest thrusts by flipping the infant face up, using two fingers to deliver quick thrusts to the center of their chest.