-I need to solve 4 questions -Avoid plagiarism, the work should be in your own w

-I need to solve 4 questions
-Avoid plagiarism, the work should be in your own words.
-All answers must be typed using Times New Roman (size 12, double-spaced) font.
-I do not want a solution that is too long or too short. It is enough that the answer is what is required
Textbook:
Mankiw, N. Gregory. Principles of Macroeconomics, 6th ed. Mason, OH: South-Western Cengage Learning, 2011. ISBN: 9780538453066 (hard copy); ISBN: 9781115468523 (eBook)