please solve this :)

The demand for subsssembly S is 90 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 make X,2 weoks to make Y, and 1 week to make Z L2 Click the icon to virw the product structure and the time-phased product structure. Clek the icon to view the onhand irmentory. Suppose that in addition to 90 units of 5 , 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 nesded in Construtt a new net material requirements plan (entor your rosponses 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 & 30 \\ T & 20 & X & 25 \\ U & 30 & Y & 40 \\ V & 30 & Z & 80 \\ \hline \end{tabular}