please help me solve this question.. it has 5 parts

Data from 14cities were combined for a?20-year period, and the total 280 ?city-years included a total of 108 homicides. After finding the mean number of homicides per?city-year, find the probability that a randomly selected?city-year has the following numbers of?homicides, then compare the actual results to those expected by using the Poisson?probabilities:

Data from 14 cities were combined for a 20year period, and the total 280 cityyears included a total of 103 homicides. After nding the mean number of homicides per oilyyear, nd the probability that a randomly selected oilyyear has the following numbers of homicides, then compare the actual results to those expected by using the Poisson probabilities: Homicides each city-year a. 0 b. 1 o. 2 d. 3 e. 4 Actual results 190 T4 14 2 0 a. Pia) = D (Round to four decimal places as needed.)