The mean number of international migrants gained per minute in the United States in a recent year was about two. Find the probability that the number of international migrants gained in any given minute is 

(a) Exactly five 

(b) At least five, and 

(c) More than five.

Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then determine whether the events are unusual. If convenient, use a table or technology to find the probabilities.