One out of every 119 tax returns that a tax auditor examines requires an audit. Find the probability that 

(a) The first return requiring an audit is the 25th return the tax auditor examines, 

(b) The first return requiring an audit is the first or second return the tax auditor examines, and 

(c) None of the first five returns the tax auditor examines require an audit.

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.