Probabilities are based on equally likely outcomes, a long-run set of observed outcomes, or subjective assessment. Tell which of these three applies in each of the following situations.
a. A football coach assesses an injured player as being "doubtful," meaning the probability is 0.25 that he will play in the upcoming game.
b. A coin is flipped to determine which football team will get the ball first; the probability is 0.50 that a given team will win the coin flip.
c. A particular football team has won four out of its five home games so far, so the coach states that the probability of winning a home game is 0.80.