The number of people arriving for treatment at an emergency room can be modeled by a Poisson process with a rate parameter of six per hour. (a) What is the mean value # ? (b) What is the probability that exactly five arrivals occur during a particular hour? (Round your answer to three decimal places.) (c) What is the probability that at least five people arrive during a particular hour? (Round your answer to three decimal places.) (d) What is the probability that at most five people arrive during a particular hour? (Round your answer to three decimal places.) (e) How many people do you expect to arrive during a 30-min period? people