A pressure-measuring device indicates that the blood pressure of a normal person oscillates between 120 mm Hg (at the peak of the heartbeat) and 80 mm Hg (between heartbeats).When the pressure-measuring device is taken off of the person and used to measure the pressure of the room air, it indicates a value of 0. For a normal person at sea level (where the air pressure = 1.0 atm),
a. What are the gauge pressures at the peak and between beats?
b. What are the absolute pressures at the peak and between beats?