A vegetable distributer knows that during the month of August, the weights of its tomatoes are normally distributed with a mean of 0.63 Ib and standard deviation of 0.15 Ib.

(a) what percent of the tomatoes weigh less than 0.78 Ib? _____ %

(b) in the shipment of 6,000 tomatoes, how many tomatoes can be expected to weigh more than 0.33 Ib? ______ tomatoes

(c) in the shipment of 4,500 tomatoes, how many Tomatoes can be expected to weigh from 0.33 Ib to 0.93 Ib? _____ tomatoes.