A pharmaceutical company is testing a new drug. After a person takes A0 mg of the drug: the amount of the drug (in mg) in that person's body t hours later is given by AS] = Agekt. In the tests1 it is found that it takes 24 hours for the amount to reduce to 25% of the amount taken. a] Find the value of k. Do not round your answer. b} If a person takes 150 mg of the drugI how long will it talre for the amount to reduce to 95 mg? Round your answer to two decimal places