Suppose you're in a class of 30 students. The instructor takes a simple random sample of 5 students and observes their ages. Imagine all of the different samples possible (there are 142,506 such samples possible!). Let X denote the oldest age in your sample. The distribution of all values taken by X in all possible samples of 5 students selected from the 30 students in your class is:

a the parameter

b the probability that x is obtained