(a) Why do the authors believe that the probability that all the drugs fail is(1~0,05) 100 '2 (b) Evaluate that expression and confirm that there is more than a 99 percent chance that at least one drug succeeds. (c) The implicit assumption in the first question is that the individual probabilites of success are independent. Suppose that the 100 drugs represent just five different kinds of drugs and that each kind has a 5 percent chance of success. Calculate the probability that at least one kind succeeds