The gross requirements for Item X are specified for the beginning of weeks 1 through 8 in the table that follows. The product structure for the item is given in the figure: The lead time of each item is specified within square brackets. For example, the lead time for Item X is 1 week. The number of units required for each lower level part is specified within parentheses. For example, each unit of Item B requires 1 unit of Part C and 2 units of Part D.

Product Structure for Item X

Item X
	Week 1	Week 2	Week 3	Week 4	Week 5	Week 6	Week 7	Week 8
Gross Requirement	0	0	0	0	0	50	75	60
On-hand Inventory
Planned Order Release

The projected on hand inventory at the beginning of Week 1 (end of Week 0) for Item X is 30 units and for Item B is 10 units. There are no scheduled receipts. What is planned order release for Item M in Week 1? Specify the number of units. What is planned order release for Item M in Week 2? Specify the number of units. What is planned order release for Item M in Week 3? Specify the number of units.