Final answer:
To find the profit-maximizing quantity, compare the marginal cost and marginal revenue curves and determine the quantity at which they intersect.
Step-by-step explanation:
Total revenue, marginal revenue, total cost, and marginal cost can be calculated for each output level using the given information. On one diagram, a sketch of the total revenue and total cost curves can be made. On another diagram, the marginal revenue and marginal cost curves can be sketched. To find the profit-maximizing quantity, we compare the marginal cost and marginal revenue curves and determine the quantity at which they intersect.