A furniture company has demand for 70 units of assembled product Q in week 7. Each unit of Q requires 1 unit of Rand 2 units of S. Each unit of R requires 1 unit of T, 2 units of U, and 1 unit of V. Finally, each unit of S requires 2 units of W and 3 units of X. One company manufactures all items. It takes 1 weeks to make Q, 1 week to make R, 2 weeks to make S, 2 weeks to make T, 3 weeks to make U, I week to make V, 2 weeks to make W, and 1 week to make X. a) Construct a product structure. Identify all level, parents, and components ( 5 marks) b) Prepare a time-phase product structure. (4 marks) ITEM ITEM ON-HAND INVENTORY 30 Q R S T ON-HAND INVENTORY 10 20 10 30 U V W X 25 240 40 c) Using the information in the table along with the information from above, construct a net material requirements plan using the above on-hand inventory: Q, R,S AND T ONLY