Suppose Powers Ltd. just issued a dividend of $2.51 per share on its common stock. The company paid dividends of $2.01, $2.08, $2.25, and $2.35 per share in the last four years. Required: If the stock currently sells for $70, what is your best estimate of the companys 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).)