Sketch the appropriate curves. A calculator may be used.

A normal person with a pulse rate of 60 beats/min has a blood pressure of “120 over 80.” This means the pressure is oscillating between a high (systolic) of 120 mm of mercury (shown as mmHg) and a low (diastolic) of 80 mmHg. Assuming a sinusoidal type of function, find the pressure p as a function of the time t if the initial pressure is 120 mmHg. Sketch the graph for the first 5 s.