please help i dont even knoe where to begin

Assume that Product 2 is made of two unis of A and four unts of B. A is made of three units of C and thiee of D,O is made of three units ot o Lead rimes for purchase or fabication of eoch unt to final assembly are Z fakes two wecks. A. B, C. and D teke one week each, and E takes tniee weniks. Sevenfy units of Product Z are requaed in Period to, (Assume that there b curenty no inventory on-hand of any of these itencic) b. Develog an MAP planning sehedule showing gross and net recuirements and order reicase and order receipt dates Note: Leave the cells blank, whenever zere (0) la requlred