Problem 12-15 Arithmetic and Geometric Returns (LO1] A stock has had returns of 8 percent, 26 percent, 18 percent. -14 percent, 26 percent and -6 percent over the last six years. What are the arithmetic and geometric average returns for the stock? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) % Arithmetic average return Geometric average return %