can you help me with this?

Consider the following table for the total annual returns for a given period of time. Average Standard Series return Deviation Large-company stocks 10.78 19.31 Small-company stocks 16.4 33.0 Long-term corporate bonds 6.2 8.4 Long-term government bonda 6.1 9.4 Intermediate-term government bonds 5.6 5.7 U.S. Treasury bills 3.8 Inflation 3.1 3.1 4.2 What range of returns would you expect to see 68 percent of the time for large-company stocks? (A negative answer should be indicated by a minus sign. Input your answers from lowest to highest to receive credit for your answers. Do not round Intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g. 32.16.) Expected range of returns 1% to What about 95 percent of the time? (A negative answer should be indicated by a minus sign. Input your answers from lowest to highest to receive credit for your answers. Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g. 32.16.) Expected range of returns % % to