A drug used to treat cancer is effective at low doses with an efficacy that increases with the quantity of the drug. However, at sufficiently high doses, the drug becomes lethal. For positive values of the constantsk

2. A drug used to treat cancer is effective at low doses with an efficacy that increases with the quantity of the drug. However, at sufficiently high doses, the drug becomes lethal. For positive values of the constants kll and hi the fraction of patients surviving cancer with this drug treatment is given by '1 q 3 = _ (q) k1+q k2+q where q is the drug quantity in milligrams/day given to the patient. Assume that in