4. For the subassembly discussed in 1 above, construct a gross material requirements plan, and net materials requirements plan for items S, T, U and V, given the on-hand inventories for S, T, U and V are 10, 20, 30 and 20 respectively. The demand for subassembly S is 400 units in week seven. It takes 1 week to make S, 2 weeks to make T. 2 weeks to make U and I week to make V. Construct the Gross MRP and Net MRP by completing the tables below. GROSS MRP Item S Gross Req. Order Release T Gross Req. Order Release U Gross Req. Order Release V Gross Req. Order Release NET MRP Item S Gross Req. On Hand Net Req. Order Release T Gross Req. On Hand Net Req. Order Release U Gross Req. On Hand Net Req. Order Release V Gross Req. On Hand Net Req. Order Release Wk. 1Wk. 2 Wk. 3 Wk. 4 Wk. 5 Wk. 6 Wk. 7 Lead Time Wk. 1Wk. 2 Wk. 3 Wk. 4 Wk. 5 Wk. 6Wk. 7 Lead Time