Classify each statement as an example of classical probability, empirical probability, or subjective probability.
a. The probability that a student will get a C or better in a statistics course is about 70%.
b. The probability that a new fast-food restaurant will be a success in Chicago is 35%.
c. The probability that interest rates will rise in the next 6 months is 0.50.
d. The probability that the unemployment rate will fall next month is 0.03.