Competition Laws

Watch the following video:

Video link in the comments

and answer the following questions: Q1- Can we say that the free market will always work for the best of society's welfare if it is kept free without government regulations.

Q2- What are the examples mentioned in the talk of some firms trying to limit competition?

Q3- Explain the role of competition laws in an economy and how they may enhance society's welfare.

Please answer the required questions in detail I hope the answer is not copy-paste

I hope that the solution will be simplified in the form of points