In the science exhibit of a museum of natural history, a coin-flipping machine tosses a silver dollar into the air and tallies the outcome on a counting device. What are all of the respective possible outcomes in any three consecutive coin tosses? In any three consecutive coin tosses, what is the probability of: a) at least one head, b) not more than one head, c) at least two heads, d) not more than two heads, e) exactly two heads, f) exactly three heads.