Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y.

	Returns
Year	X	Y
1	11 %	23 %
2	29	44
3	18	-12
4	-19	-26
5	20	52

Requirement 1:
(a)	Calculate the arithmetic average return for X

(b)	Calculate the arithmetic average return for Y

Requirement 2:
(a)	Calculate the variance for X.

(b)	Calculate the variance for Y

Requirement 3:
(a)	Calculate the standard deviation for X

(b)	Calculate the standard deviation for Y