The demand for subassembly S is 100 units in week 7. Each unit of S requires 2 units of T and 1 unit of U. Each unit of requires 1 unit 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, 2 weeks to make T, 2 weeks to make U, 1 week to make V, 2 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. B. Level 0 Level 0 S S T2) V( U (1) T(2) 1 1 2 Y(1) W2) X1 (1) Z(2) 2 V(1) Y(1) Z(2) W(2) X(1) Oc. OD. Level 0 s Level 0 S T(2) U (1) V(1) U (1) a 1 1 2 V1) W2) X(1) Y(1) Z(2) 2 T2) W2) Xu Yu 22) b) Choose the correct time-phased product structure. OA. B. C. D. 6 G 6 Z V V V U C C C G Y w T w T WI T S E X E X E X E S S s T w Y Y Y U U U V Z Z Z 1 2 3 4 01 6 7 1 2 4 01 6 1 2 3 4 01- 6 7 1 2 3 4 01- - 7