Construct a production possibilities curve for a nation facing increasing opportunity costs for producing food and video games. Show how the PPC changes given the following events.
a. A new and better fertilizer is invented.
b. Immigration occurs, and immigrants' labor can be employed in both the agricultural sector and the video game sector.
c. A new programming language is invented that is less costly to code and is more memory efficient, enabling the use of smaller game cartridges.
d. A heat wave and drought result in a 10 percent decrease in usable farmland.