Hampton Corporation has a beta of 0.72 and a marginal tax rate of 34%. The expected return on the market is 10% and the risk-free interest rate is 102%. Estimate the firm's cost of internal equity. SET YOUR CALCULATOR TO 4 DECIMAL PLACES AND ROUND TO 2 DECIMAL PLACES AT THE END DO NOT ENTER THE SIGN. IF YOUR ANSWER 15 7.7000%. FOR EXAMPLE, ENTER 770