Over the past five years, Corny Dogs, Inc. shareholders have had returns of 13.52%, 14.18%, 9.71%, 9.36%, and 9.18%, respectively. What is the standard deviation of returns for Corny Dogs stock? (Enter your answer as a percent rounded to two decimal places.)The answer is not 2.45 % or 4.89 , Ive posted three times already and all answers were incorrect. Please help