The demand for sub assembly S is 100 units in week 7.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 I unit of X.Finally each unit of u requires 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 makeX.2 weeks to make Y,and 1 week to make Z

ITEM	ON HAND INVENTORY	ITEM INVENTORY	ON HAND
S T U V	20 20 40 30	W X T Z	20 25 240 40

a).Using the information in problem above, construct a net material requirements plan using the following on- hand inventory

b).Refer again to problems above and in a).in addition to 100 units of S, there is also a demand for 20 units of U, which is component of S.The 20 units of U are needed for maintenance purposes. These units are needed in week 6. Modify the net material requirements plan to reflect this chan