Exercise 3 The end item 'Z' is requested in week 6 (80 items) and in week 8 (30 items). 'A' is usually manufactured/ordered in lot size of 50 items. The item 'A' will be received from outside in four batches (one in week 1, one in week 3, one in week 5, and one in week 7). On hand, there are 20 items of A and 30 items of 'C'. Lead times for all items are function of quantity: one week for up to 100 items, two weeks for 101 to 200 items, three weeks for 201 to 300 items, and four weeks for 301 or more items. Develop a materials requirement plan for 'A' providing the product structure tree below (next page)? N 20 2A 5E