Please provide all steps and a detailed explaination of what im supposed to do. I am so confused

The demand for subassembly S is 130 units in week 7 . Each unit of S requires 1 unit of T and 1 unit 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 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. Suppose that in addition to 130 units of S, there is also a demand for 30 units of U, which is a component of S. The 30 units of U are needed for maintenance purposes. These units are needed in week 6 . Additionally, a new order has been received for 80 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)