I really need help please!! ::))

One unit of A is made of three units of B, one unit of C, and two units of D. B is composed of two units of E and one unit of D. C is made of one unit of B and two units of E. E is made of one unit of F. Items B, C, E, and F have one-week lead times; A and D have lead times of two weeks. Assume that lot-for-lot (L4L) lot sizing is used for Items A, B, and F; lots of size 45, 45, and 175 are used for ltems C, D, and E, respectively. Items C,E, and F have on-hand (beginning) inventories of 10, 50, and 140, respectively; all other items have zero beginning inventory. We are scheduled to receive 12 units of A in Week 2,40 units of E in Week 1, and also 50 units of F in Week 1 . There are no other scheduled receipts. If 30 units of A are required in Week 8 , use the lowlevel-coded bill-of-materials to find the necessary planned-order releases for all components. Develop an MRP planning schedule showing gross and net requirements and order release and order receipt dates. Note: Leave the cells blank, whenever zero (0) is required