Lawrence 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 growth from year 4 to infinity.
b. Dividends are expected to grow at 8% annually for 3 years, followed by a 0% constant growth from year 4 to infinity.