There are people taking part in a raffle. Bob, Elsa, Hans, Jim, Kira, Omar, Ravi, and Soo. Suppose that prize winners are randomly selected from the people. Compute the probability of each of the following events. Event A: Ravi is the first prize winner, Omar is second, Bob is third, and Jim is fourth. Event B: The first four prize winners are Omar, Kira, Jim, and Elsa, regardless of order. Write your answers as fractions in simplest form.