I seem to not understand this problem, could you please help me with the answers and how to do it? thank you.

The demand for subassembly S is 120 units in week 7. Each unit of Srequires 1 unit of T and 1 unit 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 1 unit 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. 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 120 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 70 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). More Info More Info The product structure. The time-phased product structure. Level V Item Item 0 w T O On-Hand Inventory 20 20 40 30 S T U On-Hand Inventory 25 25 40 180 T(1) X U (1) 1 W Y Z S YO U > Z 2 V2) W(2) X(2) Y(1) 23) Time in weeks Print Done Done Item Week 4 5 6 Lead Time (weeks) 1 3 N 7 8 120 70 20 0 100 70 100 70 2. S Gross req On hand Net req Order receipt Order release T Gross req On hand Net req Order receipt Order release U Gross req On hand Net req Order receipt Order release 1 100 70 200 140 20 0 180 140 180 140 180 140 100 90 0 30 70 90 N 70 90 70 90 360 280 20 0 340 280 340 280 2 340 280 360 280 30 0 330 280 330 280 330 280 V Gross req On hand Net req Order receipt Order release W Gross req On hand Net req Order receipt Order release X Gross req On hand Net req Order receipt Order release Y Gross req On hand Net req Order receipt Order release 1 180 140 25 0 155 140 155 140 155 140 70 90 40 0 30 90 30 90 2 30 90 Z Gross req On hand Net req Order receipt Order release 210 270 2100 0 270 0 270 0 270 1