Describe fixed and variable costs. Summarize pure competition. Summarize monopolistic competition. Summarize an oligopoly. ?Summarize a pure monopoly. Explain how pure competition maximizes

1. Describe fixed and variable costs.
2. Summarize pure competition.
3. Summarize monopolistic competition.
4. Summarize an oligopoly.
5.  Summarize a pure monopoly.
6. Explain how pure competition maximizes profits.

Choose any one part of the Discussion Question (1,2,3,4,5 or 6) and give a real-life example/illustration.