An Investor has invested 60 % of his money in security A and 40% in security B. calculate the expected return and expected risk of his portfolio if the details of security A and B is given below:

Probability	Return(%)
	A	B
0.2	15%	15%
0.3	20%	25%
0.2	-10%	5%
0.3	30%	20%

If correlation coefficient between A and B is a) r = 1, b) r = -1