Normal probability distribution Assuming that the rates of return associated with a given asset investment are normally distributed; that the expected return, r, is 19.8%; and that the coefficient of variation, CV, is 1.25 , answer the following questions: a. Find the standard deviation of returns, r. b. Calculate the range of expected return outcomes associated with the following probabilities of occurrence: (1) 68%, (2) 95%, (3) 99%. a. The standard deviation of returns, r, is \%. (Round to three decimal places.) b. (1) The lowest possible expected return associated with the 68% probability of occurrence is %. (Round to two decimal places.) The highest possible exfected return associated with the 68% probability of occurrence is \%. (Round to two decimal places.) (2) The lowest possible expected return associated with the 95% probability of occurrence is \%. (Round to two decimal places.) The highest possible expected return associated with the 95% probability of occurrence is \%. (Round to two decimal places.) (3) The lowest possible expected return associated with the 99% probability of occurrence is \%. (Round to two decimal places.) The highest possible expected return associated with the 99% probability of occurrence is \%. (Round to two decimal places.)