You have done a thorough study of the economy and Stock X and concluded that: (1) the probability of having a boom next year is 20 percent, a stable economy is 55 percent, and a recession is 25 percent, and (2) the price of Stock X will be $45 if there is a boom, $25 if the economy is stable, and $15 if there is a recession. What is the ex ante expected return on Stock X if it is currently selling for $24?