phone calls arrive at a computer help desk at a rate of 24 calls per hours.a. What is the probabilit

phone calls arrive at a computer help desk at a rate of 24 calls per hours.a. What is the probability of 3 calls in a 15-minute interval of time?b. What is the probability of no class in a 15-minute interval?c. What is the probability that at least one call comes in within a 30 minute interval?