The 95% prediction interval of corporate bonds is between? The 95% prediction interval of T-Bills is between?

Calculate the 95% prediction intervals for the four different investments included in the following table. 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% C. The 95% prediction interval of small stocks is between - 60.46 % and 96.54 %. (Round to two decimal places and put the lower number first.) The 95% prediction interval of the S&P500 is between % and %. (Round to two decimal places and put the lower number first.)