If the economy booms, Meyer&Co. stock will have a return of 18.6 percent. If the economy goes into a recession, the stock will have a loss of 7.7 percent. The probability of a boom is 70 percent while the probability of a recession is 30 percent. What is the standard deviation of the returns on the stock? Multiple Choice o 3 736% o 9.16% o 780% o 8.51% o 12.05%