\begin{tabular}{cccc} \hline Item & Lead Time & On-Hand Inventory & Components \\ \hline Stepper & 2 & 20 & A(1),B(3),C(2) \\ A & 1 & 10 & D(1),F(2) \\ B & 2 & 30 & E(1),F(3) \\ C & 3 & 10 & D(2),E(3) \\ D & 1 & 15 & \\ E & 2 & 5 & \\ F & 2 & 20 & \\ \hline \end{tabular} Heather Adams, production manager for a Colorado exercise equipment manufacturer, needs to schedule an order for 50 UltimaSteppers, which are to be shipped in week 8 . Subscripts indicate quantity required for each parent. Assume lot-for-lot ordering. This exercise contains only parts b and c. Click the icon to view information about the steppers. The product structure is as follows: b) Choose the correct time-phased structure. A. B. c) Develop a net material requirements plan for F (enter your responses as whole numbers)