4. Consider a firm with the following total cost and total revenue given in the table: Quantity Total Cost Marginal Marginal Cost Total Revenue Profit (II) Revenue (MR) (MC) (TC) 0 (TR) $8 $0 9 8 - 10 2 16 11 3 24 13 32 A 19 40 27 6 48 37 7 56 a) Calculate profit for each quantity in the table above. How much should the firm produce to maximize profits? b) Calculate marginal revenue and marginal cost in the table above and graph them in the space below. This can be a sketch rather than a plot of the data, but use the data as your guide, and denote the profit- maximizing q on your graph