Give answers and work

passengers arrive randomly and independently at the passenger-screening facility at a major international airport. The mean arrival rate is 5 passengers per minute. mpute the probability of one arrival in a one-minute period. (4 points) mpute the probability that two or more passengers arrive in a one-minute period. (5 points) mpute the probability of no arrivals in a 12-second period. (4 points) mpute the probability of at least one arrival in a 12-second period. (4 points)