please answer only if you are 100% correct.

Al-Jareer book store uses 2-week periodic review period for its books inventory. For a particular book, the weekly demand during the 2-week review period is assumed to be normally distributed with a mean of 20 units (books) and the standard deviation of 5 units. Whereas, during the lead time period of 4 days, the demand also behaves normally with mean 5 unit and a standard deviation of 3 units respectively. Given the store only permits 20 percent stockout situation, what should be the order quantity, assuming there are on stocks? Round-up to the nearest integer O a. 56 b. 58 OC None is correct d. 53 e. 52 63 The daily demand of a dairy product a local retail store is believed to be constant and deterministic at 100 units. However, once ordered for replenishment, the lead time varies and follows normal distribution with an average of 7 days, and a standard deviation of 1.5 days. If firm only accepts 5 percent stockout probability, then what should be the reorder point? Round-up to the nearest integer O a 847 O b. None is correct Oc947 Od 960 e. 1050