The future earnings, dividends, and common stock price of Caretta Technologies Inc. are expected to grow 8% per year. Caretta's common stock currently sells for $24.50 per share, its last dividend was $2.50. A flotation cost of 10% will be paid for raising new common equity. a. Using the information provided, calculate the cost of retained earnings (ks). b. Using the information provided, calculate the cost of external equity (ke). c. If the firm's beta is 1.85, the risk-free is 4.8%, and the market risk premium is 7.6%, what will be the firm's cost of common equity using the CAPM approach