Over the last six years the shares of company XYZ's stock had returns of 20 percent, 13 percent, 12 percent, -7 percent, 12 percent, and -7 percent.

Required:
(a)	Calculate the arithmetic average return.
	(Click to select) 7.53% 7.37% 8.60% 7.17% 7.27%

(b)	Calculate the geometric average return.