I need help with all parts plz

(Measuring growth) Solarpower Systems earned $20 per share at the beginning of the year and paid out $8 in dividends to shareholders (so, D0=$8 ) and retained $12 to invest in new projects with an expected return on equity of 21 percent. In the future, Solarpower expects to retain the same dividend payout ratio, expects to earn a return of 21 percent on its equity invested in new projects, and will not be changing the number of shares of common stock outstanding. a. Calculate the future growth rate for Solarpower's eamings. b. If the investor's required rate of return for Solarpower's stock is 13 percent, what would be the price of Solarpower's common stock? c. What would happen to the price of Solarpower's common stock if it raised its dividends to $13 and then continued with that same dividend payout ratio permanently? Should Solarpower make this change? (Assume that the investor's required rate of return remains at 13 percent.) d. What would happened to the price of Solarpower's common stock if it lowered its dividends to $3 and then continued with that same dividend payout ratio permanently? Does the constant dividend growth rate model work in this case? Why or why not? (Assume that the investor's required rate of return remains at 13 percent and that all future new projects will earn 21 percent.) a. What is the future growth rate for Solarpower's earnings? \% (Round to two decimal places.) a. What is the funte grosth rate for Solarponer's earnings? \% (Racad to two decimal places.) b. If the invesion's required rate of renum for Solarpower's stock is 14% what would be the price of Solinpower's common stock? (Round to the nearest cent.) c. What would happen to the price of Solarpower's cocrmon stock if it had raised its dividends to $12(D0=$12) and then contirued with that same dividead payout ratio permanently? (Raund to the nearest cent.) Should Solarpower make this change? (Select from the drop-down menus.) Solarpower raise its dividend because the retention ratio will and the value of the conmon stock wIl