Can you please help me with the formulas to figure out this question?

Common stock value: Variable growthLawrence Industries' most recent annual dividend was $1.80 per share (D0=$1.80), and the firm's required return is 11%. Find the market value of Lawrence's shares when:a. Dividends are expected to grow at 8% annually for 3 years, followed by a 5% constant annual growth rate in year 4 to infinity.b. Dividends are expected to grow at 8% annually for 3 years, followed by a 0% constant annual growth rate in year 4 to infinity.c. Dividends are expected to grow at 8% annually for 3 years, followed by a 10% constant annual growth rate in year 4 to infinity.