help please !

Anvils Works' requires, on average, 2,800 tons of aluminum each week, with a standard deviation of 1,000 tons. The lead time to receive its orders is 10 weeks. The holding cost for one ton of aluminum for one week is $11. It operates with a 0.98 in-stock probability, Use Table 115 (Round your answer to nearest integer.) a. On average, how many tons does it have on order? tons (Round your answer to nearest Integer.) b. On average, how many tons does it have on hand? tons (Round your answer to nearest integer.) c. If its average inventory was 5,000 tons, what would be its average holding cost per week? per week (Round your answer to 2 decimal places.) If its average inventory was 10,000 tons, what would be its average holding cost per ton of d. aluminum? + per ton (Round your answer to 4 decimal places.) Suppose its on-hand inventory is 4,975 tons, on average. What in-stock probability does it offer to its customers? e