Please help for 5 and 6

The following function f(x)=-6x3+48x+64 models x in hours with the percentage of people f(x) on a cruise ship that got COVID and still measured a temperature at the particular time tested. The doctor testing the temperatures only tested the first 3 hours of the cruise. There are multiple parts and I will grade your work on your paper and BOX your answers. a. At the start of the cruise, what was the percentage that had COVID and still a fever (probably should have not gotten on the cruise @) (round to one decimal place) b. At what time was the maximum percentage of people had COVID and still a fever? (type this answer in the answer box provided and round to two decimal places - no need for any hour to minutes conversion) c. At what time was the mimum percentage of people had COVID and still a fever? (round to nearest integer) d. What was the minimum percentage during the time the doctor measured temperatures? (round to one decimal place) QUESTION 6 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(617.2Tit + TT/6) where P(t) is the pressure in pounds per square foot at time t seconds. Find P(0.0001) and P'(0.0001) and interpret your answers (meaning give units). Put the derivative in the answer blank rounded to four decimal places