Two leases in Eastern Nevada are being combined to form the East End Unit.

Lease	WI	RI	Acreage Contributed	Estimated Net Recoverable bbls
Lease 1	100% Desert Oil Co.	1/9 John Brown, 1/10 Jane Black	550 acres	260,000 bbls
Lease 2	70% Canyon Oil Ltd, 30% River Sands Inc	1/4 Sam White	400 acres	320,000 bbls

Requirement:
 a. Determine the participation factors for each party assuming the participation factors are based on the acreage contributed.
 b. Determine the participation factors for each party assuming the participation factors are based on the net recoverable barrels contributed.
 c. Determine the participation factors for each party assuming the participation factors are based on the acreage contributed weighted 40% and the net recoverable barrels weighted 60%.