Explain how (if at all) each of the following events will affect a country's production possibilities curve.
a. A devastating earthquake destroys numerous production facilities.
b. The number of unemployed workers decreases due to a government sponsored job creation campaign that gives privately owned firms giant tax incentives to hired currently unemployed workers.
c. The largest oil reserve ever is discovered ¼ mile directly under the undeveloped land the College owns behind the football field.