Answer and Explanation:
1. Is economically efficient because the opportunity cost of producing the last hamburger equals the marginal benefit of consumption
the economy is efficient since the equilibrium quantity is exactly produced at the equilibrium price
2 and 3.
a. The market price is determined solely by the forces Of supply Of and demand for a good.
b. Firms can freely enter Or exit the market without any barriers.
c. Private property rights are well-defined and enforced.
The above can all be seen as characteristics of an efficient market. Private property rights is included here since it is one of the bedrocks of capitalist economies which are fundamental for an efficient market