System, Con 4. (VALUE 15) Demand for bicycle products (S) is 40 units in week 5. Each unit of S is made of 2 units of T and 3 units of U. Each unit of T is made of 1 unit of V and 2 units of W. It takes 1 week to make an S, 1 week to make a T, 2 weeks to make a U, 1 week to make a V and 2 weeks to make a W. The following is information on on-hand inventory Item On-hand inventory S 10 20 h 30 15 W 30 a. Create a product structure, and define the levels. b. Create a net material requirement plan for S, T, U, V, W, with lot size rules Lot-for-Lot. T U V