How many immediate unique parent items

$($one level above$)$ does item I have? How

many immediate parents does item E have?

How many unique components does product

A have at all levels?

Which of the components are purchased

items?

How many intermediate items does product

A have at all levels?

Given the lead times $($LT$)$ in weeks, how far in

advance of shipment of product A must a

purchase commitment be for any of the

purchased items identified in part $($c$)?$

Assume no inventory on hand and an MPS

quantity for A is $5,$ what will the gross

requirements for E be$?$