housings Each clamp has $1$ handle and $2$ castings Each housing has $2$ bearings 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$,],[$II$,],[$III$,],[$IV$,]]$