A vegetable distributor knows that during the month of August, the weights of its tomatoes are normally distributed with a mean of 0.63 lb and a standard deviation of 0.15 lb. (See Example 2 in this section.) (a) What percent of the tomatoes weigh less than 0.78 lb? % (b) In a shipment of 8,000 tomatoes, how many tomatoes can be expected to weigh more than 0.33 lb? tomatoes (c) In a shipment of 3,500 tomatoes, how many tomatoes can be expected to weigh from 0.33 lb to 0.93 lb? tomatoes