Explain how each of the following situations would affect a nation’s production possibilities curve. 

a. A law is passed which makes community college tuition-free for all U.S. citizens.
b. An unexpectedly mild spring results in a bumper crop of citrus fruit in both Florida and California.

c. A change in immigration laws significantly increases the number of immigrant workers entering the country.
d. The amount of time that unemployed workers can collect unemployment insurance is increased from 26 weeks to 96 weeks during a recession, resulting in workers remaining unemployed for a longer period of time.
e. An innovation in desalinization technology allows for the more efficient conversion of salt water to fresh water.
f. A radiation leak at a nuclear power plant results in the long-term evacuation of a 10,000 square-mile area, which significantly reduces the nation’s productive capacity.