The risk-free rate of return is 2% and the expected return on the market portfolio is 8%. Oklahoma Oilco has a beta of 2.0 and a standard deviation of returns of 26%. Oilco's marginal tax rate is 35%. Analysts expect Oilco's net income to grow by 12% per year for the next 5 years. Using the capital asset pricing model, what is Oklahoma Oilco's cost of common stock?