I need help on these questions

QUESTION 3 The change in pressure on the eardum occurs when a pure musical tone is played. For middle C, the pressure on the eardum follow the following sine curve P(t) = 0.005sin(781.1nt + TT/4) where P(t) is the pressure in pounds per square foot at time t seconds. Find P(0 00016) and P'(0.00016) and interpret your answers (meaning give units) Put the derivative in the answer blank rounded to four decimal places. QUESTION 4 Suppose the success of a cancer treatment y, measured in fraction cancer free, depends on the dosage, x, in mg, of treatment drug in the following way y = 1x 16 + x2 Determine the dosage of the drug that maximizes treatment success (show on paper in your work) and the maximum possible fraction (enter in answer blank round to two decimals) cancer free Explain the meaning of your answer with units on your paper