There are 6 people taking part in a raffle.
Bob, Elsa, Jim, Kira, Lena, and Omar.
Suppose that prize winners are randomly selected from the 6 people.
Compute the probability of each of the following events.
Event A: The first four prize winners are Bob, Omar, Lena, and Kira, regardless of order.
Event B: Omar is the first prize winner, Elsa is second, Bob is third, and Kira is fourth.
Write your answers as fractions in simplest form.