3. More than 50 million guests stay at bed and breakfasts (B&Bs) each year. The website for the

Bed and Breakfast Inns of North America, which averages seven visitors per minute, enables

many B&Bs to attract guests (Time, September 2001).

a. Compute the probability of no website visitors in a one-minute period.

b. Compute the probability of two or more website visitors in a one-minute period.

c. Compute the probability of one or more website visitors in a 30-second period.

d. Compute the probability of five or more website visitors in a one-minute period.