Queries presented to a computer database are a Poisson process of rate λ = 6 queries per minute. An experiment consists of monitoring the database for m minutes and recording N(m), the number of queries presented. The answer to each of the following questions can be expressed in terms of the PMF PN(m)(k) = P[N(m) = k].
(a) What is the probability of no queries in a one minute interval?
(b) What is the probability of exactly six queries arriving in a one-minute interval?
(c) What is the probability of exactly three queries arriving in a one-half-minute interval?