Assume that there are 7 different issues of Newsweek, 6 different issues of Sports Illustrated, and 2 different issues of Time, including the December 1st issue, on the rack. You choose 4 of them at random.
1. What is the probability that you choose 3 issues of Newsweek and 1 issue of Sports Illustrated?
2. What is the probability that you choose at least 1 of the Sports Illustrated magazines?