Eastern Electric currently pays a dividend of $164 per share and sells for $27 a share. a. If investors believe the growh rate of dividends is 3% per year, what rate of return do they expect to earn on the stock? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places. b. If investors' required rate of return is 10%, what must be the growh rate they expect of the firm? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places. c. If the sustainable growh rate is 5% and the plowback ratio is 0.4 , what must be the rate of return earned by the firm on its new investments? Note: Enter your answer as a percent rounded to 2 decimal places