all of question 5 please 5. The function D(h) = 8e can be used to find…

all of question 5 please
5. The function D(h) = 8e can be used to find the number of milligrams D of a certain drug that is in a patient’s bloodstream h hours after the drug has been administered. a. How many milligrams will be present after 4 hours? b. When the number of milligrams reaches 1, the drug is to be administered again. After how many hours will the drug need to be administered?