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 coffee drinks per day follows a normal distribution.
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?

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