Cn you please explain how to solve below problem?

(2) Recall that the expected value E[X] for a random variable X is E[X] = LEValues(X) X * P(X = x), where Values(X ) is the set of values X may take. Similarly, the expected value of any function f of random variable X is E[X] = LxEValues(X) f(x) * P(X = x). Now consider the function below (called the "indicator function" ). o ( X = a) := if X = a 0 ifX * a Let X be a random variable which can have values 2, 4 or 8 with probabilities P2, p4 and pg respectively. Calculate E[S(X = 8)]