One unit of A is made up of one unit of B and one unit of C. B is made of three units of D and one unit if F. C is composed of three units of B, one unit of D, and four units of E. D is made of one unit of E. Item C had a lead time of one week; Items A,B,E and F have two week lead times; and item D has a lead time of three weeks. Lot-for-lot sizing is used for items C,E,and F. los of size 20,40,and 160 are used for items A,B,and D resepctively. Items A,B,D,andE have on-hand (beginning) inventories of 5,10,100, and 100 respectively; all other items have 0 beginning inventories. We are scheduled to recieve 10 units of A in Week 3, 20 units of B in Week 7, 40 units of F in Week 5, and 60 units of E in week 2; there are no other scheduled receipts. If 20 units of A are required in Week 10, use the low-level coded bill of materials (product structure tree) to find the necessary planned order releases for all components.