Answer:
The correct answers are the following:
Macroeconomics: the government's decision on how much to spend on public projects
Microeconomics: the effects of the internet on the pricing of used cars; the effect of a cigarette tax on the quantity of cigarettes sold.
Explanation:
On the one hand, microeconomics is the name given to the part of the economic science that studies the relationships among the economic agents, the results of their interactions and how they affect the economy in its whole. Moreover, it also focuses in the behavior of individuals and firms when making decisions and how that affect the economy.
On the other hand, macroeconomics is the name given to the part of the economic science that studies the most important phenomenons in the whole of the economy, its main situation to resolve are the inflation, the unemployment and how to devolop as best as possible the economy in order to obtain a long-run economic growth.
