For each of the following, indicate whether the type of probability involved is an example of a priori probability, empirical probability, or subjective probability.
a. The next toss of a fair coin will land on heads.
b. Italy will win soccer's World Cup the next time the competition is held.
c. The sum of the faces of two dice will be seven.
d. The train taking a commuter to work will be more than 10 minutes late.