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.