Let H stand for heads and let T stand for tails in an experiment where a fair

Question:

Let H stand for heads and let T stand for tails in an experiment where a fair coin is flipped twice. Assume that the four outcomes listed are equally likely outcomes:
HH, HT, TH, TT
What are the probabilities of getting?
a. 0 heads?
b. Exactly 1 head?
c. Exactly 2 heads?
d. At least 1 head?
e. Not more than 2 heads?