Eighty-two percent of people using electronic cigarettes (vapers) are ex-smokers of conventional cigarettes. You randomly select 10 vapers. Find the probability that the first vaper who is an ex-smoker of conventional cigarettes is 

(a) The second person selected, 

(b) The fourth or fifth person selected, and 

(c) Not one of the second through seventh persons selected.

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.