Can someone help me with T, U, V, W, X, and Z?

The demand for subassembly S is 130 units in week 7. Each unit of S requires 1 unit of T and 2 units of U. Each unit of T requires 2 units of V, 2 units 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 takes 2 weeks to make S, 1 week to make T, 2 weeks to make U, 1 week to make V, 3 weeks to make W, 2 weeks 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. Construct a gross material requirements plan (type 0 if the input box is not used). Week 4 Lead Time (weeks) Item 1 2 3 5 6 7 S 0 0 0 0 0 0 130 Gross req Order release 0 0 0 0 130 0 0 2 T Gross req Order release 1 - X - 0 More Info The product structure The time-phased product structure. Level V 0 S T W X T(1) U 2) 1 Y U Z 2 V2) W2) X2) Y(2) 2(3) 1 2 Time in weeks Print Done Enter your answer in TOTO narts