Hi Muhammetd640,

That's a difficult question to answer, but I do have a couple courses that could help you. 

This is a great video about economic profit in competitive markets: https://www.khanacademy.org/economics-finance-domain/ap-microeconomics/production-cost-and-the-perfect-competition-model-temporary/ap-perfect-competition/v/economic-profit-for-firms-in-perfectly-competitive-markets 

For monopolistic markets, this is a great video:

https://www.khanacademy.org/economics-finance-domain/ap-microeconomics/imperfect-competition/monopolistic-competition/v/monopolistic-competition-and-economic-profit 

Both of those videos touch on the subjects that are needed for your homework. If you are needing more information, a great course to look into would be: https://www.khanacademy.org/economics-finance-domain/ap-microeconomics 

However, all of the sources I listed are intended for students high school and beyond. If you are in a lower grade, they might not be as useful to you. 

This is another Microeconomics course that might be helpful when learning the basics and is a little more simple. And while it might not touch on all of the areas that you're looking into, it is a great place to start when learning the basics.

https://www.khanacademy.org/economics-finance-domain/macroeconomics 

I hope those help. Let me know if you have any additional questions, and good luck on your homework :)