The expected rate of return and risk: Kelly B. Stites, Inc. is considering an investment in one of two portfolios. Given the information tha follows, which investment is better, base on risk ( as measured by the standard deviation) and the expected rate of return?

Portfolio A	Portfolio B
Probability	Return	Probability	Return
0.15	-1%	0.05	4%
0.57	17%	0.25	9%
0.28	26%	0.38	13%
		0.32	16%

a the expected rate of return for portfolio B is ________ round to two decimal places

b the standard deviation for fortfolio B is ____________ round to two decimal places