Please help with question B and C

The safety stock for the P system is ???

C. It is time for the periodic review. How much kitty litter should be ordered ?

The order quantity is ???

Sam's Cat Hotel operates 48 weeks per year, 5 days per week. It purchases kitty litter for $6.50 per bag. The following information is available about these bags: > Demand = 55 bags/week > Order cost = $75/order > Annual holding cost = 28 percent of cost > Desired cycle-service level = 98 percent > Lead time = 2 week(s) (10 working days) > Standard deviation of weekly demand = 6 bags > Current on-hand inventory is 275 bags, with no open orders or backorders. Suppose that Sam's Cat Hotel uses a P system. The average daily demand, d, is 11 bags (55/5), and the standard deviation of daily demand, a. What P (in working days) and T should be used to approximate the cost trade-offs of the EOQ? The time between orders, P, should be 42 days. (Enter your response rounded to the nearest whole number.) The target inventory, T, should be 612 bags. (Enter your response rounded to the nearest whole number.) b. How much more safety stock is needed than with a Q system? bags. (Enter your response rounded to the nearest whole number.) Standard Deviation of Weekly Demand Days per Week is 2.683 bags. Refer to the standard normal table for z-values