Question 1 18 pts The concentration of a drug in a patient's bloodstream is monitored over 10-minute intervals for two hours. t (min) 0 10 20 30 40 50 60 70 80 90 100 110 120 C (mg) 0 2 17 37 55 73 89 103 111 113 113 103 68 a.) How fast is the concentration of the drug changing at 40 minutes? [ Select ] b.) How fast is the concentration of the drug changing at 95 minutes? [ Select ] c.) Is the drug's concentration increasing or decreasing at 115 minutes? [ Select ]