business administration problem

the demand for subassembley S IS 100 units in 7 weeks. 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 above construct a net material requirments plan usingthe following on hand inventory
 
 
NEED tonight