Question 15 (2 points) When two countries trade freely, all people in both countries are better off. (:3 True False Question 16 (2 points) In the long run, we expect zero economic profit for an average firm in a perfectly competitive market. I: a} True I: a} False Question 17 (2 points) Free market is always the most efficient in terms of the social surplus we can get. '1: True '1: False Question 18 (2 points) If we tax a market that has inelastic demand and supply, the deadweight loss will be smaller than taxing a market that has more elastic demand and supply. I: a) True I: a) False