ing Editing a) Convert 70 mmHg and 120 mmHg into both SI and PSI pressure units. In blood pressure readings, are these absolute pressure or gauge pressure? How do they compare with atmospheric pressure (compare 1 atm to SI, PSI, and mmHg pressure units)? b) Consider a plunger that reduces an air-filled container from 0.5 liters to 0.45 liters while the temperature is kept at room temperature at 20 C. What will be the increase in pressure above the atmospheric pressure, in units mmHg? How is this similar and different from the heart-blood system