6. Below is return data for Companies X and Y.

Year	Return X	Return Y
1	15%	30%
2	17%	12%
3	25%	0%

1. Compute the mean return for each stock.
2. Compute the variance and standard deviation for each stock.
3. Looking at the data, would there be any benefits to buying both stocks rather than just one?

8. Below is return data for Companies X and Y.

Prob	Return X	Return Y
20%	15%	30%
50%	17%	12%
30%	25%	0%

1. Compute the mean return for each stock.
2. Compute the variance and standard deviation for each stock.
3. Looking at the data, would there be any benefits to buying both stocks rather than just one?