Explain how (if at all) each of the following events affects the location of a country's production possibilities curve (illustrate your answer with a diagram):

1.The rise of internet and computer industry.

2.A sharp rise in oil price has caused many workers to be laid off.

3.An outbreak of "killer flu" disease has reduced 1/3 of the country population.

4.Government's liberal immigration policy has attracted a million skilled workforce from overseas.