The quantity of a drug, Q mg, present in the body / hours after an injection of the drug is given is Q = f (t) = 150te -0.5t Find f(1), f' (1), (7), and f' (7). Give units and interpret the answers. Round your answers to two decimal places. f(1) = i f' (1) = (7) = f' (7) = 1 Interpretation of f (1) and f' (1): One hour after the drug was administered, the quantity of drug in the body is approximately Interpretation of f (7) and f' (7): Seven hours after the drug was administered, the quantity of drug in the body is approximately