I need help solving the two highlighted sections. Thanks!

(Common stock valuation) Assume the following: - the investor's required rate of return is 13.5 percent, - the expected level of eamings at the end of this year (E1) is $8, - the retention ratio is 50 percent, - the retum on equity (ROE) is 15 percent (that is, it can earn 15 percent on reinvested earnings), and - similar shares of stock sell at multiples of 8.334 times earnings per share. Questions: a. Determine the expected growth rate for dividends. b. Determine the price earnings ratio (P/E1). c. What is the stock price using the PiE ratio valuation method? d. What is the stock orice usina the dividend discount model? c. What is the stock price using the PIE ratio valuation method? (Round to the nearest cent.) d. What is the stock price using the dividend discount model? (Round to the nearest cont.) e. (i) Using the dividend discount model, what would be the stock price if the company increased its retention rate to 80% (holding all else constant)? (Round to the nearest cent.) What would be the P/E ratio (P:E1 ) if the company increased its retention ratio to 80% (holding all else constant)? (Round to three decimal places.)