Looking for help on probelm C and D. I figured out A and B but can't get the correct answer for C and D.

Suppose that the number of accidents occurring in an industrial plant is described by a Poisson process with an average of1.5 accidents every three months. During the last three months, four accidents occurred. {a} Find the probability that no accidents will occur during the current three-month period. {Do not round intermediate calculations. Round your answer to 4 decimal places] m o {b} Find the probability that fewer aocidents will occur during the current three-month period than occurred during the last three-month period. (Do not round intermediate calculations. Round your answer to 4 decimal places.) Po: 5 3) | 0.9344 9 {c] Find the probability that no more than 12 accidents will occur during a particular year. (Do not round Intermediate calculations. Round your answer to 4 decimal places} m we {d} Find the probability that no accidents will occur during a particular year. {Do not round Intermediate calculations. Round your answer to 4 decimal places} P{x = a) 0.0000 9