DO HAND CALCULATIONS by completing the attached TEMPLATE for Problem 14.8. Your HAND CALCULATIONS need to include ADDITIONS & SUBTRACTIONS and drawing ARROWS to show distribution of materials over LEAD TIMES. Write a few sentences to EXPLAIN what the SPECIFIC NUMERICAL RESULTS are and mean for this "Gross Materials Requirement Plan" for Problem 14.8. .. 14.8 Refer again to Problems 14.5 and 14.6. In addition to 100 units of S, there is also a demand for 20 units of U, which is a component of S. The 20 units of U are needed for maintenance purposes. These units are needed in week 6. Modify the gross material requirements plan to reflect this change. PX (ii.) Do your HAND CALCULATIONS directly on your POM output by showing ADDITONS & SUBTRACTIONS and drawing ARROWS to show distribution of materials over LEAD TIMES as in Figure on page 573. Write a few sentences to EXPLAIN what the SPECIFIC NUMERICAL RESULTS are and mean for this "Net Materials Requirement Plan for Problem 14.7." .. 14. Refer again to Problems 14. S and 14.7. In addition to 100 units of S. there is also a demand for 20 units of U, which is a component of S. The 20 units of U are needed for maintenance purposes. These units are needed in week 6. Additionally, a new order has been received for 80 units of S due in week 8. Modify the net requirements plan to reflect these changes. PX .. 14.5 The demand for subassembly S is 100 units in weck 7. Each unit of S requires 1 unit of T and 2 units of U. Each unit of T requires 1 unit of V, 2 units of W. and I unit of X. Finally, cach unit of U requires 2 units of Y and 3 units of Z. One firm manu- factures all items. It takes 2 weeks to make S, I weck to make T. .. 14.6 Using the information in Problem 14.5, construct a gross material requirements plan. PX .. 14.7 Using the information in Problem 14.5, construct a net material requirements plan using the following on-hand inventory. ex ON-HAND ON HAND ITEM INVENTORY ITEM 30 25 240 2 weeks to make U, 2 weeks to make V. 3 weeks to make W, 1 week to make X. 2 weeks to make Y, and I week to make Z a) Construct a product structure. Identify all levels, parents, and components b) Prepare a time-phased product structure 8991