just case 2 please

Q.2. If a firm's last dividend paid (DO) = $2.37 and its required rate of return is 10%, value the stock under different dividend growth pattern assumptions. Please note: The value of a stock can be thought of as the present value of all future dividend payments (starting at time 1). Case 1 - Dividends are expected to grow at 5% forever. Case 2 - Dividends are expected to grow at 12% for four years, then at 3% forever