High Growths annual stock returns over the last 7 years are: 27%, 38%, 34%, 11%, 28%, 75%, and 15%. What is High Growths standard deviation of return? Enter your answer rounded to two decimal places. Do not enter % in the answer box. For example, if your answer is 0.12345 or 12.345% then enter as 12.35 in the answer box.