The table below shows annual returns for stocks of companies X and Y. Calculate the arithmetic average returns. In addition, calculate their variances, as well as their standard deviations.

	Returns
Year	X	Y
1	12 %	21 %
2	30	42
3	19	-11
4	-20	-25
5	21	50

Requirement 1:
(a)	The arithmetic average return of company X's stock is:
	(Click to select) 15.13% 12.40% 14.01% 10.04% 15.50%

(b)	The arithmetic average return of company Y's stock is:
	(Click to select) 19.25% 17.40% 12.47% 18.79% 15.40%

Requirement 2:
(a)	The variance of company X's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 0.029913 0.036930 0.046014 0.036812 0.046163

(b)	The variance of company Y's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 0.133287 0.106630 0.120642 0.096514 0.086370

Requirement 3:
(a)	The standard deviation of company X's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 21.45% 15.57% 19.22% 24.02% 19.09%

(b)	The standard deviation of company Y's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 34.73% 32.65% 26.45% 40.82% 31.07%