11. A perishable dairyr product is ordered daily at a particular supermarket. The product, which costs $1.19 per unit, sells for $1.65 per unit. If units are unsold at the end of the day, the supplier takes them back at a rebate of $1 per unit. Assume that daily demand is approximately normally distributed with pa =15 and a = 30. a} What is your recommended daily order quantity for the supermarket? b} What is the probability that the supermarket will sell all the units it orders? e} In problems such as these, why would the supplier offer a rebate as high as $1? For example, why not offer a nominal rebate of, say, $6.25 per unit? What happens to the supermarket nrder quantit}.r as the rebate is reduced