In a Q system, the demand rate for strawberry ice cream is normally distributed, with an average of 300 pints per week. The lead time is 9 weeks. The standard deviation of weekly demand is 15 pints. a. What is the standard deviation of demand during the 9-week lead time? b. What is the average demand during the 9 -week lead time? c. What reorder point results in a cycle-service level of 99 percent