The milkweed aphid is a common pest to many ornamental plants. Suppose that the number of aphids on a shoot of a Mexican butterfly weed follows a Poisson distribution with ?=4 aphids. a) What is the probability (±0.0001) of observing exactly 5 aphids on a shoot? P(X=5) = b) What is the probability (±0.0001) of observing 5 or fewer aphids on a shoot? P(X?5) = c) What proportion (±0.0001) of shoots would you expect to have no aphids present? P(X=0) =