1. BHP is the only mining company conducting minerals testing in this region. BHP review their minerals testing budget. BHP conclude that if they increase their testing budget, they will identify more potential developments than just the one on Marian's property, in fact, even more than they have the capacity for.

If they increase their testing budget substantially, they expect to find roughly 3 properties (owned by two other people), with roughly the following types of values:

	Opportunity cost	Expected earnings of the mine
Property 1 (Marian's)	20	100
Property 2	15	90
Property 3	10	80

If BHP has the capacity to develop at most 2 mines (because of their limited resources in people and equipment), what would the outcome of negotiations with these property owners be? What is the range of possible prices for each property sold?