Using the following returns, calculate the average returns, the variance, standard deviations, and coefficient of variation for X and Y. Which stock is the least risky?

Yr	Rx	Ry
1	8.00	-3.40
2	12.50	16.00
3	6.50	12.50
4	15.00	9.57

Using the following returns, calculate the expected returns, the variance, standard deviations, and coefficient of variation for X and Y. Which stock is the least risky?

Prob	Rx	Ry
20%	8.00	-3.40
30%	12.50	16.00
25%	6.50	12.50
25%	15.00	9.57