help please

4. (20 pts.) The weekly demands for an item are as in the table: 1 0 2 0 Week Gross requirements 3 60 4 55 5 40 6 0 7 40 8 50 alo 10 45 11 50 12 80 Assume a holding cost of $0.48 per unit per week, a setup cost of $75 per setup, a lead time of two weeks and 70 units on hand. a) Develop a MRP plan using the lot-for-lot, EOQ and POQ lot sizing techniques b) What are the costs of using the lot-for-lot, EOQ and POQ lot sizing techniques? Which technique produces the lowest total cost