I need help for the following questions

1.What is the difference between micro and macro economics? Give an example of a microeconomic phenomenon and an example of a macroeconomic one.

2.Go to the internet and find a recent article that you find that is relevant for this section. Provide the link, and a summary of the article and discuss, in a few words, why you found the article interesting

3.Provide an example of a sunk cost. How does this differ from a marginal cost? Explain a time you did (or should have) used marginal analysis to solve a problem