7.18.	Single asset portfolios: Using the information from problems 7.15, 7.16, and 7.17, calculate each coefficient of variation.
Problem 7.15
	State of the Economy			Probability		Rate of return
	Healthy			0.4		30%
	Soft			0.5		10%
	Recession			0.1		-25%
Problem 7.16
	Prob	Return
Boom	0.1	25.00%
Good	0.4	15.00%
Level	0.3	10.00%
Slump	0.2	-5.00%
Problem 7.17
	Prob	Return
Boom	0.1	40.00%
Good	0.2	30.00%
OK	0.3	15.00%
Level	0.2	2.00%
Slump	0.2	-12.00%