Find the expected value of the random variable g(X) = X2, where X has the probability distribution

Question:

Find the expected value of the random variable g(X) = X2, where X has the probability of Exercise 4.2.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...