2. The number of copies of The Statistician that a newsagent sells each week is modelled by a Poisson distribution. On average, he sells 1.5 copies per week.
- Find the probability that he sells no copies in a particular week.
- If he stocks 5 copies each week, find the probability he will not have enough copies to meet that week's demand.
- Find the minimum number of copies that he should stock in order to have at least a \(95 \%\) probability of being able to satisfy the week's demand.