Suppose Powers Ltd. just issued a dividend of $2.49 per share on its common stock. The company paid dividends of $1.99, $2.06, $2.23, and $2.33 per share in the last four years. Required: If the stock currently sells for $68, what is your best estimate of the company’s cost of equity capital using arithmetic and geometric growth rates? (Do not round intermediate calculations. Enter your answers as a percentage rounded to 2 decimal places (e.g., 32.16).) Cost of equity Arithmetic dividend growth rate % Geometric dividend growth rate %