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An auto parts detailer uses a 5-week periodic review system to replenish its inventory stocks. The lead time is assumed to be 1 week since an order is placed to its receipt. The demand for an auto part during the 6 weeks (review period and lead time) is observed to be normally distributed with and mean of 20 units with a standard deviation of 5 units. If the manager places an order of 17 units with no other stocks for this product in-hand, what is provability that there will be stock out prior to the arrival of the replenishment? Round to 3-decimal places O a 0.739 Ob. None is correct Oc0.726 d. 0.851 Oe0.500 The daily demand is normally distributed with a mean of 100 units, and standard deviation of 10 units. Also, the lead time varies, but assumed to have followed normal distribution with an average of 7 days, and a standard deviation of 1.5 days. The firm wishes to maintain a 99 percent service level. What should be the reorder level? Round-up to the nearest integer O a None is correct Ob 951 Oc1100 O d. 829 e. 1055