5. Alex, Kara, and Susie are the only three people in a community. Alex is willing to pay $40 for the third unit of a public good; Kara is willing to pay $25. If the marginal cost of producing the third unit is $80, what is the minimum amount that Susie must be willing to pay for it to be efficient for government to produce the third unit? Select one: . a. $65 x b. The amount cannot be determined with the information provided. C. $95 d. $80 e. $15 31. The equations for the demand and supply curves for a particular product are P = 10 - 0.4 Q and P = 2 + 0.4 Q, where P is price and Q is quantity expressed in units of 100. After an excise tax is imposed on the product, the supply equation is P = 4 + 0.4 Q. The equilibrium quantity before the excise tax is imposed is Select one: a. 1,200 units. . b. 750 units. x C. 875 units. d. 1,000 units. 45, Assume that all workers are equally productive, but the wage is $30, compared to $0