Eastern Electric currently pays a dividend of about $1.71 per share and sells for $34 a share. a. If investors believe the growth rate of dividends is 4% per year, what is the opportunity cost of capital? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Cost of Capit E IL b. If investors' opportunity cost of capital is 10%, what must be the growth rate they expect of the firm? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Growth rate C. If the sustainable growth rate is 3% and the plowback ratio is .6, what must be the return on equity ROE? (Round your answer to 2 decimal places.) ROE