Final answer:
In a two-rescuer scenario, the first rescuer should use a compression rate of 100 compressions per minute. The emphasis is on performing deep and effective compressions of at least 5 cm in depth.
Step-by-step explanation:
In a two-rescuer scenario, the first rescuer should use a compression rate of 100 compressions per minute. This is the same rate as the beat in the song "Staying Alive" by the Bee Gees, which is recommended for performing high-quality chest compressions during CPR. The emphasis is on performing deep and effective compressions of at least 5 cm in depth.