Problem 4 (14 pts) A grandma at CBE community was not feeling well because of the stress induced by the 5th pandemic wave in the community. The doctor checked the grandma's medical history and found that she used to have a healthy blood pressure (i.e., 120 and 80 mmHg for systolic and diastolic pressure, respectively) and a regular heart beat rate of 75 bpm and a cardiac output of 7.5 L/min. What was her stroke volume SV (ml/beat) in the past (4 pts)? She started to show hypertension in recent months because of atherosclerosis, resulting in the blood pressure of 165 mmHg (systolic) and 85 mmHg (diastolic). If the grandma's cardiac output (CO) has dropped to 4 L/min with a heart beat rate of 50 bpm, what is the stroke volume of her heart now (mL/beat) (4 pts)? Did the compliance (C) of her aorta change at all, compared to her earlier historical record and by how much percentage? (6 pts)