Principles of Microeconomics

Can anyone assist me with these questions?

 

Critical Thinking Questions:

1. Are differences in geography behind the

differences in absolute advantages?

2.  Why does the United States not have an absolute

advantage in coffee?

3.  Why might a low-income country put up barriers

to trade, such as tariffs on imports?

4.  Can a nation’s comparative advantage change over

time? What factors would make it change?

5.   What’s the difference between economic immigrants, legal immigrants, and illegal immigrants? Do immigrants help or hurt the economy. Explain.