Really need help on this question. Got everything wrong. Please help out. Thank you

value: 2.00 points Problem 10-17 Return Distributions [LO 3] Consider the following table for the total annual returns for a given period of time. Series Average return Standard Deviation Large-company stocks Small-company stocks Long-term corporate bonds Long-term government bonds Intermediate-term government bonds U.S. Treasury bills Inflation 11.7 % 20.6% 33.0 9.8 9.4 5.7 3.1 4.2 16.4 6.8 6.1 5.6 3.8 3.1 Requirement 1: What range of returns would you expect to see 68 percent of the time for long-term corporate bonds? (Negative amount 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. Enter your answers asa percentage rounded to 2 decimal places (e.g., 32.16).) Expected range of returns -12.8 % to 26.4 % Requirement 2: What about 95 percent of the time? (Negative amount 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. Enter your answers as a percentage rounded to 2 decimal places (e.g., 32.16).) Expected range of returns -22.6 % to 36.2 %