Based on economic conditions, you compiled the following information with estimates of returns from Happy Turtle Transporters, Inc.'s stock and the probabilities associated with the economic condition for the next year: Using this information, calculate the standard deviation of returns from Happy Turtle Transporters, Inc.'s stock. 422.68% 38.19% 20.56% 4.53% Analysts and finance professionals often use the historical standard deviation to calculate estimates of the future variability. An important disclaimer in their analysis, however, always states that past performance is not a guarantee of future results. Thus, it is important to understand that the average realized rate of return (r) should not be used as the expected rate of return (r^)