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 T requires 2 units of V. 1 unit 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 2 weeks to make Z a) Choose the correct product structure. OA. Level 0 a . Level 0 Q S S T(2) 1 | V2 o V2 LU) Q 1 2 Y W) X(1) U Z2) 2 T2) W X1) Yu 22 Level 0 a OD Q S Level 0 Um T2) T(2) S 10 1 1 2 V 2 Y Z2 Wis) X 2 V12 Win Xin Yen 2,23 b) Choose the correct time-phased product structure, O A. OB. OC. Q OD a a V V Z U Q Y T WT WIT W os os os s x X S 09 S T 3 Y Y NK X K - x ul U U ZI N WIN N- 4 3