1. Identify the differences between all four market structures(perfect competition, monopolistic competition, oligopoly, and monopoly) in the short-run and long-run. This will be helpful as many of you may hold management positions and/or become entrepreneurs in the near future. When deciding what type of firm to own or operate, you may find that one market structure may be more advantageous over another based on short-run and long-run costs.  
2. Explain the significance that the average total cost (ATC) curve has on profit and loss based on each type of market structure. Explore how the ATC curve affects all four market structures and identify whether firms will earn a profit or loss based on the placement of the ATC curve and price.
3. Please place the paper in APA 7 format and  include at least 2 resources