Builtrite's common stock is currently selling for $62 a share and the firm just paid an annual dividend of $2.80 per share. Management believes that dividends and earnings should grow at 6% annually. Based on this, and a marginal tax rate of 34%, what is the cost of common stock (also known as the cost of retained earnings)? O 10.8% O 7.1% O 10.5% O 11.5%