Problem 4. There are 80 students at a fraternity party, with equal numbers of freshmen, sophomores, juniors, and seniors (20 of each). Eight people are randomly selected to receive door prizes. This is similar to exercise 1.22. (a) (8%) What is the probability these eight prizes are equally distributed to the four classes (two to each)? (b) (8%) What is the probability that no freshmen receive prizes