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	7 %	22 %
2	25	43
3	14	-9
4	-15	-23
5	16	51

Requirement 1:
(a)	The arithmetic average return of company X's stock is:
	(Click to select) 7.61% 10.62% 9.40% 11.75% 11.47%

(b)	The arithmetic average return of company Y's stock is:
	(Click to select) 20.50% 16.80% 13.61% 21.00% 18.98%

Requirement 2:
(a)	The variance of company X's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 0.018411 0.022730 0.022360 0.027950 0.028412

(b)	The variance of company Y's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 0.129150 0.095996 0.083689 0.119995 0.103320

Requirement 3:
(a)	The standard deviation of company X's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 14.85% 18.85% 15.08% 12.21% 16.72%

(b)	The standard deviation of company Y's stock returns is: (Do not round intermediate calculations.)
	(Click to select) 30.98% 26.04% 34.64% 32.14% 40.18%