Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of

0.8 cups. Assume the number of drinking per day follows a normal distribution. Show your

work and, if possible, include the curve diagram.

a.

What proportion drink 2 cups per day or more?

b. What proportion drink no more than 4 cups per day?

c. If the top 5% of coffee drinkers are considered heavy coffee drinkers, what is the

minimum number of cups consumed by a heavy coffee drinker?