Historical Realized Rates of Return

You are considering an investment in either individual stocks or a portfolio of stocks. The two stocks you are researching, Stock A and Stock B$,$ have the following historical returns:

Stock A:

Stock B:

calculations. Round your answers to two decimal places. Negative values, if any, should be indicated by a minus sign.

A risk$-$averse investor should choose $-$ Select$-,$ since it offers $--$Select$-$ expected return with $-$ Select$-$ risk.