please show all work and explanations

- 19. Each X requires 2 of component Y and 1 of part W. Each Y requires 10 of Z. Each W requires 3 of Q and 2 of R. Lead times are X = 1 week, Y = 1 week, W-2 weeks, R 1 week, Z = 3 weeks, and Q = 3 weeks. The following time schedule diagram corresponds correctly to the above information. IN Y Q X w R Time in 4 3 6 5 2 1 A) true B) false C) cannot tell 79 75% + B) none of these choices D) Economic Order Quantity (EOQ) 21. Each Xtrequires 2 of component Y and 1 of part W. Each Y requires 10 of Z. Each w requires 3 of Q and 2 of R. Lead times are X = 1 week, Y = 1 week, W-2 weeks, R = 1 week, Z = 3 weeks, and Q - 3 weeks. The following bill of material reflects the preceding information. The eventual quantity of Z is Item Bill of Material Quantity 1 Y 2 z W 1 3 R 2 B) 13 C) 10 D) 20 A) 15 E) 30