The demand for subassembly S is 100 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 1 unit of X. Finally, each unit of U requires 1 unit of Y and 2 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, 1 week to make X 2 weeks to make Y, and 1 week to make Z. a) Choose the correct product structure. OA . Level 0 Level 0 S S T(1) V(2) Q TU U(1) 1 1 2 Yu) W2) X(1) U) 22) 2 V2) W2) X1 YO) 22) OC. OD Level 0 Level 0 S S V2) U U (1) T(1) Q 1 1 et 2 T) W2) X(1) Y1) Z2) 2 V2) Y(1) Z2) W2) X1