Flip a coin three times. Let X denote the number of heads minus the number of tails.

Question:

Flip a coin three times. Let X denote the number of heads minus the number of tails. So, for instance, if (if, T, T) is the outcome, then X = 1- 2 = -1.
a. What are the possible values of X?
b. What is the mass of X?
c. Make a plot of the probability mass function.
d. What is the CDF of X?
e. Make a plot of the CDF.