In Problem 5, for n = 3, if the coin is assumed fair, what are the probabilities

Question:

In Problem 5, for n = 3, if the coin is assumed fair, what are the probabilities associated with the values that X can take on?
Problem 5
Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed n times. What are the possible values of X?