Please answer the question in the image

3. (80) Suppose there are two firms with identical average and marginal cost, AC = MC =20. The market demand curve is P=200-2Q. a. Given market demand and MC and AC, find Cournot-Nash price, quantities, profits b. Given market demand and MC and AC, find the perfect collusion price, quantities and profits c. Given market demand and MC and AC, find the Bertrand price and quantities