1. Summerville Inc. is considering an investment in one of two common stocks. Given the information:

COMMON STOCK A		COMMON STOCK B
PROBABILITY	RETURN	PROBABILITY	RETURN
0.2	12%	0.2	-4%
0.6	14%	0.3	5%
0.2	20%	0.3	14%
		0.2	21%

which investment is better, based on the risk (as measured by the standard deviation) and return of each?

B1. The standard deviation for Stock A is___ % (Round to two decimal places and assume %)

B2. The standard deviation for Stock B is ____% (Round to two decimal places and assume %)

Please post calculations and formulas!