Consider the following table for different assets for 1926 through 2017.

Series	Average return		Standard Deviation
Large-company stocks	12.1	%	19.8	%
Small-company stocks	16.5		31.7
Long-term corporate bonds	6.4		8.3
Long-term government bonds	6.0		9.9
Intermediate-term government bonds	5.2		5.6
U.S. Treasury bills	3.4		3.1
Inflation	3.0		4.0

a.	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. Enter your answers from lowest to highest. Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)
b.	What about 95 percent of the time? (A negative answer should be indicated by a minus sign. Enter your answers from lowest to highest. Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)