(Expected rate of return and risk ) Summerville Inc. is considering an investment in one of two common stocks. Given the information that follows, which investment is better, based on the risk (as measured by the standard deviation) and return of each?

Common Stock A	Probability	Return
	0.20	12%
	0.60	15%
	0.20	20%

Common Stock B	Probability	Retuen
	0.10	-5%
	0.40	5%
	0.40	14%
	0.10	21%

a. Summerville Inc. is considering an investment in one of two common stocks. Given the information in the table, what is the expected rate of return for Stock A? (Round to two decimal places)

b. What is expected rate of return for Stock B?