2. 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 's component(s) is (are) not shown. If we 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 level four 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)