This attempt took 30 minutes. Question 1 0 / 1.5 pts An analyst makes the following forecasts about the economy for next year and the rates of return of a portfolio: Economy Probability Rate of Return Recession 16% -9.0% Normal 54% 0% Recovery 30% 18.0% Calculate the standard deviation of the expected rates of return (as a percentage) for the portfolio for the one-year period