I need help with the answer for W

The demand for subassembly S is 120 units in week 7 . Each unit of S requires 1 unit of T and 1 unit of U. Each unit of T requires 2 units of V,1 unit of W, and 1 unit of X. Finally, each unit of U requires 1 unit of Y and 2 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. Construct a net material requirements plan using on-hand inventory (enter your responses as whole numbers)