N2 please. Thanks

2. A pharmaceutical company is testing a new drug. After a person takes A, mg of the drug, the amount of the drug (in mg) in that person's body t hours later is given by A(t) = Ane kt. In the tests, 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 drug, how long will it take for the amount to reduce to 95 mg? Round your answer to two decimal places