You have estimated the following returns and probabilities of these returns occurring next period. Give your estimates, what is the standard deviation of your return. Choose the range that includes the correct solution. Round only your final solution. State of Nature A B C D Less than 7.00% O Return -10% 0% 4% O Greater than or equal to 7.00%, but less than 7.20% O Greater than or equal to 7.20%, but less than 7.40% Greater than or equal to 7.60% 12% Greater than or equal to 7.40%, but less than 7.60% Probability 15% 20% 30% 35%