Consider the following table for the total annual returns for a given period of time.

Series	Average return		Standard Deviation
Large-company stocks	11.7	%	20.6	%
Small-company stocks	16.4		33.0
Long-term corporate bonds	6.4		9.7
Long-term government bonds	6.1		9.4
Intermediate-term government bonds	5.6		5.7
U.S. Treasury bills	3.8		3.1
Inflation	3.1		4.2
Requirement 1: What range of returns would you expect to see 68 percent of the time for long-term corporate bonds? Requirement 2: What about 95 percent of the time?