Please help with part C$!!!!!($Includes Base, Spring, Clamp, Housing, Handle, Casting, Bearing, Shaft$)$

As the production planner for Xiangling Hu Products, Inc., you have been given a bill of material for a bracket that is made up of a base, $1$ spring, and $3$ clamps. The base is assembled from $2$ clamps and $2$ housings. Each clamp has $1$ handle and $2$ castings. Each housing has $1$ bearing and $2$ shafts. There is no inventory on hand.

a$)$ Design a product structure noting the quantities for each item and show the low$-$level coding. Match each number in the structure below with the corresponding item.

$\backslash$table$[[$Number$,$Item$],[$I$,$Spring ${?}_{(1)}$