can someone else answer this question and make it easier ti read and understand please.

Refer again to Problems 14.5 and 14.6. 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 gross material requirements plan to reflect this change. Px 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. a. Construct a product structure. Identify all levels, parents, and components. b. Prepare a time-phased product structure. Using the information in Problem 14.5, construct a gross material requirements plan. PXe