Returns
1	8%	2%
2	10%	4%
3	11%	2%
4	-14%	4%
5	-2%	3%
6	23%	6%

X is the coloum on the left and Y is the right coloum down.

find

a)Calculate the arithmetic average returns, the variances, and the standard deviations for X and Y.

b)Calculate the arithmetic average return, variance, and standard deviation for a portfolio that consists of 45% stock X and 55% stock Y.