Product A is an end item and is made from three units of B and four of C. B is made of three units of D and three of E. C is made of two units of F and three of E. A has a lead time of one week. B, C, and E have lead times of two weeks, and D and F have lead times of three weeks. b. If 50 units of A are required in Week 10, develop the MRP planning schedule, specifying when items are to be ordered and received. There are currently no units of inventory on hand. (Leave no cells blank - be certain to enter "0" wherever required.)