Three Finance Questions

1) Suppose the company just paid dividend of $1. The dividends are expected to grow at 20% in Year 1 and 15% in Year 2. After that, the dividends will grow at a constant rate of 5% forever. If the required rate of return is 10%, compute today's price of the stock.        

2) Suppose the company just paid dividend of $1. The dividends are expected to grow at 25% in Year 1 and 20% in Year 2, and 15% in Year 3. After that, the dividends will grow at a constant rate of 5% forever. If the required rate of return is 10%, compute today's price of the stock.
         
3) Suppose the company will not pay any dividends in Years 1 and 2. Suppose that the company pays dividend of $1 in Year 3 and after that the dividends will grow at 20% for the next two years. After that the dividends will grow at a constant rate of 5% forever. If the required rate of return is 10%, compute today's price of the stock.