Nationwide Auto Parts uses a penodic review irventory control system for one of its stock items. The-review interval is A weeks, arnd the lead fime for roceiving the materials ordered from its wholesaler is 1 weks. Weekly demand is normally distribued, with a mean of 250 units and a standard deviation of 50 units. Refer to the standard nomal table for zā values: a. What is the average and the starkdard deviation of demand duning the protection interval? The average demand dunng the protection imerval is units. (Enter your response as an integer) The stindard deviation of domand is units. (Enter your response roended to two decimal places) b. If the tirm desians 99 percent stockout protection, the target imentory level is units. (Enter your resporise rounded to the noarest whote number)
