A friend owns stock that is expected to earn 22.0 percent in a booming economy, 12.0 percent in a normal economy, and lose 120 percent in a recession. The probability of a boom is 15 percent while the probability of a normal economy is 60 percent. What is the expected rate of return on this stock? O 13.50 percent O 5.50 percent O 11.50 percent 7.50 percent