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 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 garage pressures at the peak and between beats? b. What are the absolute pressures at the peak and between beats?