"When a market is easy to enter, you cannot make much profit in the long run. When you can make a good profit in the long run, the market is difficult to enter. So, at best, a small new business can only earn some short-run profit." Explain the rationale of this statement with what you have learned in this course. Also, give and briefly explain a situation where earning a short-run profit is possible. Please answer within 170 words and state the number of words at the end of your answer