The concentration of a drug in the body Cp can be modeled by the equation: Cp DG ka Va(ka-ke) where DG is the dosage administrated (mg), V is the volume of distribu- tion (L), k, is the absorption rate constant (h¹), ke is the elimination rate constant (h¹), and is the time (h) since the drug was administered. For a certain drug, the following quantities are given: DG = 150 mg, Va = 50 L, ka = 1.6h¹, and k = 0.4 h¹. a) A single dose is administered at t = 0. Calculate and plot Cp versus t for 10 hours. a) A first dose is administered at t = 0, and subsequently four more doses are administered at intervals of 4 hours (i.e. at t = 4, 8, 12, 16). Calculate and plot Cp versus t for 24 hours.