The demand for subassembly S is 100 units in week 7. Each unit of Srequires 1 unit of T and 2 units of U. Each unit of T requires 1 unit of V, 2 units of W, and 1 unit of X. Finally, each unit of U requires 2 units of Y and 3 units of Z. One firm manufactures all items. It takes 2 weeks to make S, 1 week to make T, 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 1 week to make Z. Click the icon to view the product structure and the time-phased product structure. 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 (type O if the input box is not used). Week 4 Lead Time (weeks) 1 2 6 Item S 3 0 0 0 0 5 0 100 0 100 0 0 0 0 0 0 2 Gross req Order release Gross reg Order release T 0 0 0 0 100 0 0 0 0 0 1 U Gross req Order release 0 0 0 0 0 200 0 0 100 0 ol 0 200 | 0 0 01 2