Today is T=0. A company paid a dividend of $4.00 yesterday. Dividends are expected to grow at a rate of 8% for three years, 7% for one year, and then at a rate of 6%, forever. The required return is 12% and is never expected to change. Estimate the equilibrium price of a share of stock at T=0. PROVE YOUR ANSWER

Please provide the steps for Terminal Value calculating and implementation into excel. I am confused and am having difficulties understanding this.