In an inventory system, the lead time L = 2. The inventory policy always keeps the post-order inventory position at 10. Please complete the following table (inventory on-hand, backlog, and inventory in tran- sit are counted at the end of each period) for periods 1 to 5. time 0 1 23 45 demand inv. position order inv. position arrived (pre-order) quantity 2 9 7 0 4 (post-order) 10 10 10 10 10 10 inv. on-hand 10 inv. in-transit 0 backlog 0