Suppose that C = f(:l3, t) = 2011903\")t represents the concentration (in mg/liter) of a drug in the blood 15 Z 0 hours after :1: mg of the drug is injected. (a) Evaluate f(2, 5) = (b) Give a practical interpretation of your answer in part (a): f(2,5) is... CA. the change in concentration of a 2 mg dose in the blood 5 hours after injection. 0 B. the concentration of a 2 mg dose in the blood 5 hours after injection. QC. the amount of a 5 mg dose in the blood 2 hours after injection