Product A is and end item and is made from 2 units of B and four of C. B is made of 3 units of D and two of E. C is made of two units of F and two of E. A has a lead time of 1 week. B, c, and E have lead times of two weeks, and D and F have lead times of 3 weeks. a. show the Bill of Materials (product structure tree) b. if 100 units of A are required in week 10, developed MRP planning schedule, specifying when items are to be ordered and received. There are currently no units of inventory on hand.