a. Compute the probability of no arrivals in a one-minute period (to 6 decimals) = .000017

b. Compute the probability that three or fewer passengers arrive in a one-minute period (to 4 decimals) = .0049

c. Compute the probability of no arrivals in a 15-second period (to 4 decimals) = .0639

d. Compute the probability of at least one arrival in a 15-second period (to 4 decimals) = .9361

b. Compute the probability that three or fewer passengers arrive in a one-minute period (to 4 decimals) = .0049

c. Compute the probability of no arrivals in a 15-second period (to 4 decimals) = .0639

d. Compute the probability of at least one arrival in a 15-second period (to 4 decimals) = .9361