The following graph shows the average and marginal cost curves for Kandi Keynes, a perfectly competitive firm. a. If the price is $70, draw in the marginal revenue curve, and label it MR1. Plot only the end points on the graph above. b. At this price, what are the break-even output(s), the profit-maximizing output, and the level of total profits at that output? Break-even output(s):.