Your investment has a 10% chance of earning a 68% return, a 25% chance of earning an 22% rate of return, a 30% chance of earning an 9.25% rate of return, a 15% chance of losing 19%, and a 20% chance of losing 50%. What is the standard deviation of this investment? 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.