3. Consider total cost and total revenue given in the following table: Loved Inguns Is bris Joshism Quantity 206 0 1 2 3 4 5 6 7 Total cost $8 9 10 11 13 19 27 37 Total revenue $0 8 16 24 32 40 48 56 a. Calculate profit for each quantity. How much should the firm produce to maximize profit? b. Calculate marginal revenue and marginal cost for each quantity. Graph them. (Hint: Put the points between whole numbers. For example, the marginal cost between 2 and 3 should be graphed at 21/2.) At what quantity do these curves cross? How does this relate to your answer to part (a)? c. Can you tell whether this firm is in a competitive industry? If so, can you tell whether the industry is in a long-run equilibrium