The demand for subassembly 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 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 3, 2 weeks to make T, 2 weeks to make V, 1 week to make V, 2 weeks to make W 2 weeks to make X, 2 weeks to make Y and 2 weeks to make Z. a) Choose the correct product structure. OA. OB. Level 0 Level S VD) UZ) TO) 1 VO 1 2 T) W2) Xc2) Y(1) Z(3) 2 Y) Wa) X@) Va) 2) OC. OD. Level 0 S Level 0 UZ) TO) 1 To UZ) 1 2 V(1) Y(1) Z3) W2) X2) 2 V(1) W) X) Y(1) Z3)