Given the following information: Expected demand during a lead time =290 units Standard deviation of demand during a lead time =45 units Demand during a lead time is distributed Normally: Refer: z-values. a. Determine the safety stock needed to attain a 1 percent risk of stockout during a lead time. (Round the final answer to th whole number.) Safety stock units b. Would a stockout risk of 2 percent require more or less safety stock? 2%stockoutriskzSS