Castles in the Sand generates a rate of return of 20% on its investments and maintains a plowback ratio of 0.20 , its earnings this year Will be $2 per share. Investors expect a rate of return of 10% on the stock. a. Find the price and P/E ratio of the firm. Note: Do not round intermediate calculations. Rlound your answers to 2 declmal places. b. Find the price and P/E ratio of the firm if the plowback ratio is reduced to 0.10 . Note: Do not round intermediate calculations, Round your answers to 2 decimal places