4. How many purchased items and subassembled items are here in this product structure? (watch out, same item is one component! End item is not subassembly) How many units of E (denoted x ) must go into B (only the left side as the right side goes inot C ) produce 5 units of end item A, if total units of item F requirement is 120 ? \begin{tabular}{|c|l|l|l|l|} \hline Answers: & Purchased item & & \\ & Subassembly & & 1% \\ & X & & 2% & Same unit is one item. For example, H is on left and right, it is just one item \\ \cline { 2 - 4 } & & & & \\ & & & \end{tabular}