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 2 units of V, 2 units of W, and 1 unit 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 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 2 weeks to make Z. a) Choose the correct product structure. O A. OB Level 0 Level 0 S S (1) U12) V (2) U(2) 1 1 2 V2) W2) X(1) Y(1) Z(3) 2 T(1W(2) X(1) Y (1) Z (3) OC. OD. Level 0 Level 0 S S T(1) V(2) U12) T(1) 1 1 2 Y(1) W(2) X(1) U(2) 2(3) 2 V2) Y(1) 2(3) W(2) X(1) b) Choose the correct time-phased product structure. A. B. C. D. V V V Z U WT WT W T Y si x X X X S s s Y Y Y T w U U U ZI Z Z V 1 7 7 7 2 3 4 5 6 Time in weeks 1 2 3 4 5 6 Time in weeks 2 3 4 5 6 Time in weeks 3 4 5 6 Time in weeks Click to select your