The demand for subassembly S is 140 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 , 1 unit of W, and 2 units of X. Finally, each unit of U requires 2 units of Y and 3 units of Z. One firm manufactures all items. It fakes 2 weeks to make S,1 week to make T,2 weeks to make U,1 week to make V.3 woeks to make W,1 week to make X,2 weeks to make Y, and 2 weeks to make Z Click the icon to view the product structure and the time-phased product structure. In addition to 140 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 mantenance purposes. These unds are needed in week 6 . Modify the gross material requirements plan to reflect this change (iope o if the input bax is not used). The demand for subassembly S is 140 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 , 1 unit of W, and 2 units of X. Finally, each unit of U requires 2 units of Y and 3 units of Z. One firm manufactures all items. It fakes 2 weeks to make S,1 week to make T,2 weeks to make U,1 week to make V.3 woeks to make W,1 week to make X,2 weeks to make Y, and 2 weeks to make Z Click the icon to view the product structure and the time-phased product structure. In addition to 140 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 mantenance purposes. These unds are needed in week 6 . Modify the gross material requirements plan to reflect this change (iope o if the input bax is not used)