The demand for subassembly S is 80 units in week 7. Each unit of S requires 2 units of T and 1 unit of U. Each unit of T requires 2 units of V, 1 unit of W, and 2 units of X. Finally, each unit of U requires 1 unit of Y and 3 units of Z. One firm manufactures all items. It takes 2 weeks to make S, 2 weeks to make T, 2 weeks to make U, 1 week to make V, 2 weeks to make W, 2 weeks 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. Construct a gross material requirements plan (type 0 if the input box is not used). Week Lead Time (weeks) Item 1 2 3 4 5 6 7 S Gross req IL IN Order release 2 T Gross req Order release 2 U Gross req JL. Order releas 2 V Gross req Order release 1 W Gross req IN II II Order release 2 Gross req Order release 2 Y Gross req Order release 2 N Gross req Order release N 1