After extensive research, you believe the probability distribution for next year's return on FB Inc is: Return Probability 10.5% 0.2 3.2% 0.3 -5.2% 0.3 21% 0.2 Compute the standard deviation of this return. Express your answer as a percentage to three decimal places (the percent sign is not essential). That is, if you compute a standard deviation of 0.12345, enter your answer as 12.345