If the economy booms, RTF, Incorporated, stock is expected t…

If the economy booms, RTF, Incorporated, stock is expected to return 9 percent. If the economy goes into a recessionary period, then RTF is expected to only return 3 percent. The probability of a boom is 69 percent while the probability of a recession is 31 percent. What is the variance of the returns on RTF, Incorporated, stock?