Problem $5(20$ points$)$

An electronic manufacturer makes a product designated as A$.$ Each unit of A is assembled from one unit of

each of two subassemblies B and C$.$ Subassembly B requires two parts of D and two of component E$.$

Component $E$ in turn is made from one of part $F$ and five fasteners coded $G.$ Subassembly $C$ consists only

of two units of part $H$ and four fasteners G$.$ The MPS for product $A$ is as follows

The MRP system's inventory record file indicates the following lead time, on$-$hand inventory, and

scheduled receipts

a$-$ Draw the bill of materials for product A $(4$ points$)$

b$-$ Find the cumulative planning horizon $($show your answer$)(4$ points$)$