Can you please provide the step by step formulas to get to the answer below?

Can you please provide the step by step formulas to get to the answer below?

Lee Corp. is expected to experience a transitory growth period for three years. During this 3-year period, its dividends will grow at annual rates of 50%, 25% and 0%, respectively. Afterwards, its dividends will decline at an annual rate of 5% indefinitely due to the intense competition. The discount rate is 12%. Lee Corp. just paid an annual dividend per share of $2.00. Compute the intrinsic value of Lee Corp.'s stock today. Answer <$23.26>