i got these wrong, please help:

Question 2 9.75 points Saved If a tariff is placed on imported steel in Canada, It would: Lower the total surplus in the Canadian market for stool. O Raise the total surplus in the Canadian market for stool. O Raise the Canadian standard of living at the expense of exporting country. O Raise the total surplus of foreign exporters and consumers of stool.Question 6 0.75 points See Answer The Efficient Scale of the firm is the quantity of output that minimizes: O Average Variable Cool O Average Total Ocal O Average Fixed Cost Q Marginal CostQuestion & 0.75 points Have Arower If 9 1595 increase in price leads to a 30% increase in quantity supplied, which statement is correct? Price elasticity of demand is 0.5. Price elasticity of demand is 2.0. C Price elasticity of supply is 2.0. O Price elasticity of supply is 0.5.Question 9 0.75 points Sara Answer Suppose that the price that Firm XYZ can receive for its output is $15 per unit. The average variable cost of production is $12 per unit The average total cost of production is $17. In the short run, which of the following condusions can be reached about this firm? O It is coming an economic profit, O It should shut down, O It is eaming zero economic profits. It should continue producing