This BOM diagram has total $5$ levels $($level $0,1,2,3$ and $4).$ We know level $3,$ J is a subassembly item. Level $4\text{'}$s component$($s$)$ is $($are$)$ not shown. need to make one $(1)$ end item A$,$ what is the minimum total units $($gross requirements$)$ we will need for this production? The component$($s$)$ in the leve is $($are$)$ not a repeat from any of those in level $0,1,2$ or $3($i$.$e$.,$ not B$,$ C$,$ D$,$ E$,$ F$,$ G or J$).$ You can name components in level $4,$ K$,$ L$,$ M$...$etc. $($Hint: Please read "Bill of Materials" section thoroughly before you start this question and #$4.$ The critical part is that $J$ is a subassembly item$).$

$($how many component $($s$)$ in level $4$ is $($are$)$ pending on your understanding of "subassembly" of item J$)$