please answer only if you are 100% correct.

A local retailer anticipates a daily demand of 50 units of a product. The retailers] allows shortages for that product, and these shortages are backordered at a rate of 1.25 times the annual unit holding cost per unit backordered. The cost of ordering is 200 OMR, whereas, the annual holding cost is 1 OMR per unit. The retailer operates 300 days per year. What is the optimal maximum inventory level?? Round-up to the nearest integer a. 1826 b. 1898 Oc 2000 Od None is correct e 1955 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 6 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. What is the expected (mean) demand and standard deviation of the demand during the review period plus the lead time? Round to 3-decimal places O a Mean-50, Standard deviation-6.681 Ob. Mean -45, Standard deviation-7.681 Oc Mean -45, Standard deviation=9,0 Od. None is correct Oe Mean=45, Standard deviation-6,403