2. Calculating marginal revenue from a linear demand curve The blue curve on the following graph represents the demand curve facing a firm that can set its own prices. Use the graph input took to help you answer the following questians. You will not be graded an any changes you make to this graph. Note: Once you enter a value in a white field, the graph and any corresponding amounts in each grey field will change accordingly. Graph Input Tool Market for Goods Quantity Denandes Demand Price (Dotiand per enic) On the graph input tool, change the number found in the Quantity Demanded field to determine the prices that correspond to the production of 0 , 4. 8, 10, 12, 16, and 20 units of output. Calculate the socal revenue for each of these production levels. Then, an the folloming grapt, wse the green points (triangie symbol) to plot the results. Calculate the total revenue if the firm produces 4 versus 3 units. Then, calculate the marginal revenue of the fourth unit produced. The marginal revenue of the fourth unit produced is Caiculate the total revenue if the firm produces 8 versus 7 units. Then, calculate the marginal revenue of the eighth unit produced. The marginal revenue of the eighth unit produced is Based on your answers from the previous question, and assuming that the marginal revenue curve is a straight line, use the black line (plus s) to plot the firm's marginal revenue curve on the following graph. (Round all values to the nearest increment of 40 .) Comparing your total revenue graph to your marginal revenue graph, you can see that when total revenue is decreasing, marginal revenue