1. Using the following returns, calculate the average returns, the variance, standard deviations and coefficient of variation for X and Y.

Year	Return X	Return Y
1	28%	15%
2	13%	-9%
3	6%	12%

2. Using the following returns, calculate the expected returns, the variance, standard deviations and coefficient of variation for X and Y.

Probability	Return X	Return Y
25%	28%	15%
50%	13%	-9%
25%	6%	12%