Alienergy Co. leases a property from Mr. Brown, who retains a 1/8 royalty interest. Alienergy Co. subsequently conveys its interest to Cabby Oil Inc. but retains 1/6 overriding royalty interest. In general, the portion of costs that Alienergy Co. should share is:

1. 0.
2. 1/8.
3. 1/6.
4. 7/48.