. This quiz: 19 pointls) possible Question 9 Of 19 > This question: 1 pointls) possible $33 A clinical test on humans of a new drug is normally done in three phases. Phase I Is conducted With a relatively small number of healthy volunteers. For example, a phase I test of a specic drug involved only 8 subjects Assume that we want to treat 8 healthy humans with this new dmg and we have 12 swtable volunteers available. Complete parts ' (a) through (0) below. ;- a. li the subjects are selected and treated in sequence, so that the trial is discontinued it anyone displays adverse effects, how many diilerent sequential arrangements are possible if 5 people are selected from the 12 that are available? Choose the correct answer below. ' N mm 0 A, 19,953,400 0 a. 479,001,600 I O c. 495 5' m W O 0. 40,320 b. if B subjects are selected from the 12 that are available, and the 8 selected subjects are all treated at the same time. how many different treatment groups are possible? There are D different treatment groups possible. c. If 8 subjects are randomly selected and treated at the same time, what is the probability of selecting the B youngest subjects? t Plselecting the B youngest subjects) = E] (Type an integer or a simplied fraction\")