The demand for subassembly S is 130 units in week 7 . Each unit of S requires 2 units of T and 2 units of U. Each unit of T requires 1 unit of V,2 units 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,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. Suppose that in addition to 130 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 90 units of S due in week 8 . Modify the net material requirements plan to reflect these changes. Construct a new net material requirements plan (enter your responses as whole numbers). The time-phased product structure. \begin{tabular}{cc|cc} \hline Item & \begin{tabular}{c} On-Hand \\ Inventory \end{tabular} & Item & \begin{tabular}{c} On-Hand \\ Inventory \end{tabular} \\ \hline S & 20 & W & 25 \\ T & 20 & X & 30 \\ U & 40 & Y & 40 \\ V & 30 & Z & 540 \\ \hline \end{tabular}