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Consider two firms competing in a market with a demand function P = 100 - Q, where P is the market price, and Q is the aggregate output. Both firms have constant marginal cost c = 10. They compete by setting quantities 41 and q2 simultaneously (Cournot game). Which of the following statements is not correct? Select one: O a. Each firm's best response is downward sloping in the other firm's output. O b. Producing zero output can be a best response for firm 1. O c. There is a unique Nash equilibrium. O d. If firm 2's marginal cost were to decrease while firm 1's marginal cost remains the same, firm 1's best response would change. Consider a binding price ceiling in a market. This market has conventional upward sloping supply curve and downward sloping demand curve. Now, consider a decrease of this price ceiling. Which of the following statements is not correct? Select one: O a. Following the decrease of this price ceiling, consumer surplus increases for sure. O b. Following the decrease of this price ceiling, quantity traded in the market decreases, O c. Following the decrease of this price ceiling, shortage in the market increases. O d. Following the decrease of this price ceiling, producer surplus decreases for sure