Review Last Word , Elon Musk, Profit Engineer in chapter 11 (page 224) and follow the instructions mentioned below( each answer should be given in one paragraph of at lease 50 words.)

1) Summarize the case topic ,

2) Analyze the case in your own words and discuss the intent of the case.

using graph if necessary.

3) Give your opinion about the case and what you have learned from it.

4) Why the perfectly competitive market structure is economically efficient.