Please answer the following questions, Thanks!!!

Question 4 3 pts Regarding the Cournot competition model in which all firms produce the same product. Which of the following is true, O The profits of each firm do not change even the number of firms competing in the market increases. O If the number of firms competing in the market increases, the price in the market increases. The consumer surplus increases with the increasing of the number of firms. O Each firm has zero profit even in the short run equilibrium. Question 5 3 pts In perfect competition, suppose the industry is in its long-run equilibrium with 100 firms. If all firms' fixed cost decreases In the new long run equilibrium, more firms enter, and the equilibrium price decreases. In the new short run equilibrium, all firms produce less. In the new short run equilibrium, consumer surplus increases O In the new short run equilibrium, all firms' profits are zero. Question 6 3 pts In perfect competition, suppose the industry is in its long-run equilibrium with 100 firms. If all firms' marginal cost decreases, in the short run equilibrium, In the new short run equilibrium, all firms' profits are positive. In the new short run equilibrium, all firms produce more. O In the new short run equilibrium, consumer surplus increases O All