Blood type AB is somewhat rare in the United States (it is found in 4% of the general population). It is particularly useful for plasma transfusions because this plasma can be accepted by individuals with all blood types. The plasma is the liquid part of the blood once all cells are removed. You count the number X of AB donors who come to a fixed Red Cross location per day. This count has the Poisson distribution, with parameter u being the mean number of AB donors per day. (a) The donation center sees an average of 2.1 AB donors per day. Find the Poisson probabilities for X = 0, 1, 2, 3, 4, 5. P(X = 0) = P(X-1)=