A stock has had returns of -18.7 percent, 28.7 percent, 20.4 percent, -9.8 percent, 34.5 percent, and 26.7 percent over the last six years. What are the arithmetic and geometric 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 %