(Types of Unemployment) Determine whether each of the following would be considered frictional, structural, seasonal, or cyclical unemployment:

a. A UPS employee who was hired for the Christmas season is laid off after Christmas.

b. A worker is laid off due to reduced aggregate demand in the economy.

c. A worker in a DVD rental store becomes unemployed as video- on-demand cable service becomes more popular.

d. A new college graduate is looking for employment.