The demand for subassembly S is 100 units in week 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 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. Click the icon to view the on-hand inventory. 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 net material requirements plan to reflect this change. Construct a new net material requirements plan (enter your responses as whole numbers). The time-phased product structure. \begin{tabular}{cc|cc} \hline Item & On-Hand Inventory & Item & On-Hand Inventory \\ \hline S & 20 & W & 30 \\ T & 20 & X & 25 \\ U & 40 & Y & 240 \\ V & 30 & Z & 40 \\ \hline \end{tabular}