an fruit grower knows from previous experience and careful data analysis that if the fruit on a specific kind of tree is harvested at this time of year, each tree will yield, on average, 140 pounds, and will sell for $2.8 per pound. However, for each additional week the harvest is delayed (up to a point), the yield per tree will increase by 3 pounds, while the price per pound will decrease by $0.05.

A) How many weeks should the grower wait before harvesting the apples in order to maximize the sales revenue per tree? (Round your answer to the nearest tenth of a week.)

B) Use your answer in part A to find the actual maximum