2. Product A consists of two units of subassembly B, three units of C, and one unit of D. B is composed of four units of E and three units of F. C is made of two units of H and three units of D. H is made of five units of E and two units of G. a. Construct a simple bill-of-materials (product structure tree). b. Construct a product structure tree using low-level coding. c. Construct an indented parts list. d. To produce 100 units of A, determine the number of units of B, C, D, E, F, G, and H required