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 ltems A, B, and F; lots of size 50, 50, and 200 are used for ltems C, D, and E, respectively. Items C,E, and F have on hand (beginning) inventories of 10,50 , and 150 , respectively; all other items have zero beginning inventory. We are scheduled to receive 10 units of A in Week 2, 50 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 low-I. I-coded bill-of-materials to find the necessary planned order releases for all components with a brief explanation of how you structred your MRP.