The price of bananas each week in a grocery store is normally distributed with a mean

The price of bananas each week in a grocery store is normally distributed with a mean (µ) of 37.8 cents per pound and a standard deviation (σ) is 3 cents.
A. What is the probability that bananas will sell for between 30 and 35 cents per pound in any given week? 
B. Mark makes it a policy not to buy bananas unless the price is 33 cents or less per pound. What proportion of the time would he buy bananas? 

Troy loves bananas. He is willing to buy bananas 95% of the time. But, she doesn’t love them enough to buy them when prices are the highest. What is the maximum price per pound that she should have to pay in order to buy bananas 95% of the time?