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

Series	Average Return	Standard Deviation
Large-Company Stocks	12.3%	20.6%
Small-Company Stocks	16.4	33.0
Long-term corporte bonds	6.2	8.4
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

What range of returns would you expect to see 68 percent of the time for large-company stocks? a) Expected range of returns ____________ % to ____________ %

What about 95 percent of the time? b) Expected range of returns ____________ % to ____________ %

**Please help and show your work if you could. I really don't understand how to do this