If returns of S&P 500 stocks are normally distributed, what range of returns would you expect to see 95% of the time? Base your answer on the information below. Average Return Standard Deviation of returns Small Stocks 18.04% 39.25% S&P 500 11.71% 19.76% Corporate Bonds 6.16% 6.36% T-Bills 3.39% 3.12% The 95% prediction interval of the S&P500 is between % and %. (Round to two decimal places and put the lower number first.)