Assume that Product Z is made of two units of A and four units of B$.$ A is made of three units of C and three of D$.$ D is made of three units of E$.$

Lead times for purchase or fabrication of each unit to final assembly are: Z takes two weeks; A$,$ B$,$ C$,$ and D take one week each; and E takes three weeks.

Sixty two units OF Product Z are required in Period $10.($Assume that there is currently no inventory on hand of any of these items.$)$

b$.$ Develop an MRP planning schedule showing gross and net requirements and order release and order receipt dates.