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. Small Stocks S&P 500 Corporate Bonds T-Bills Average Return 19.76% 11.97% 6.07% 4.12% Standard Deviation of returns 39.85% 20.13% 6.54% 3.73% The 95% prediction interval of the S&P500 is between % and % (Round to two decimal places and put the lower number first) at