Pls answer all of them

6. A. the marginal product of labor is 3. When labor usage is at 12 units, output is 36 units. From this, we may infer that B. the total product of labor is 1/3. the average product of labor is 3. none of the above. 7. You operate a car detailing business with a fixed amount of machinery (capital), but you have recently altered the number of workers that you employ per hour. Three employees can generate an average product of 4 cars per person in each hour, and five employees can generate an average product of 3 cars per person in each hour. What is the marginal product of labor as you increase the labor from three to five employees? A. MPL = 1.5 cars B. MPL = -1 cars C. MPL = 3 cars D. MPL = 15 cars 8. The Cournot Model of Oligopoly assumes that A. firms make their decisions simultaneously. B. firms decide what quantity to produce. C. firms do not cooperate. D. All of the above. producing 9. An isoquant A. is a curve that shows the maximum total output as a function of the level of labor input. B. is a curve that shows all the combinations of inputs that yield the same total output. C. is a curve that shows all possible output levels that can be produced at the same cost. D. must be linear. mizing firm finds that, at it's current lover of 10. The marginal rate of technical substitution is equal to A. the absolute value of the slope of an isoquant. B. the ratio of the marginal products of the inputs. C. the ratio of the prices of the inputs. D. A and B are both correct. censes that create a monopoly do so because opoly will become a natural monopoly 11. Which of the following average cost functions suggests the presence of a natural monopoly? A. ATC = 100 + 2 B. ATC = 2Q C. TC = 100Q2 + 2Q D. All of the above