How would each of the following likely affect long-run and/or short-run aggregate supply and employment in the

Question:

How would each of the following likely affect long-run and/or short-run aggregate supply and employment in the macro-economy?
a. An increase in the productivity of the labor force due to increased education.
b. The coldest year in a century leads to frequent ice and snow storms.
c. Major advances in computer and Internet technologies.