Suppose that Mick and Cher are the only two members of society and are willing to pay $10 and $8, respectively, for the 3rd unit of a public good.

Suppose that Mick and Cher are the only two members of society and are willing to pay $10 and $8, respectively, for the 3rd unit of a public good. Also, assume that the marginal cost of the 3rd unit is $17. We can conclude that: