Consider a Poisson probability distribution. Determine the probability of exactly four occurrences for the following conditions. a) 2 = 2.0 b) A = 3.0 c) 2 = 4.0 d) What conclusions can be made about how these probabilities change with X? a) When 2 = 2.0, the probability of exactly four occurrences is (Round to four decimal places as needed.)