(s-z) please explain and include calculations

The demand for subassembly S is 130 units in week 7 Each unit of Srequires 2 units 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 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. 2 weeks 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. Construct a gross material requirements plan (type O if the input box is not used). Week Lead Time Item 4 5 (weeks) s Gross reg 0 0 130 Order release 0 130 0 T Gross reg Order release 3 7 1 0 2 0 6 0 JOO Jo. O 0 Tool 2 -- - 1 The product structure. The time-phased product structure. Level 0 0 S. | x3