If the economy booms, Meyer 8 Company stock will have a return of 18.7 percent. If the economy 90es into a recession, the stock will have a ioss of 7.8. percent. The probability of a boom is 69 percent while the probability of a recession is 31 percent: What is the standard devation of the returns on the stock? Multiple Chaice 805% 9.477 12264 B. BD\%? 7.48%