Three Fair Coins Are Tossed and Either Heads (H)or Tails

Three fair coins are tossed and either heads (H)or tails (T)is observed for each coin.
a. List the sample points for this experiment.
b. Assign probabilities to the sample points.
c. Find the probability of the event A = {Three heads are observed}.
d. Find the probability of the event B = {Exactly two heads are observed}.
e. Find the probability of the event C = {At least two heads are observed}.