Plz show the progress

7.2 Mitubishi is expected to pay the following dividends over the next four years: $15, $10, $7.5, and $4.50. Thereafter, the company pledges to maintain a constant 10 percent growth rate in dividends, forever. If the required return on the stock is 15 percent, a. What would be the current share price? (7%) b. How much will be the share price in 10 years? (3%) (I suppose you may need the help of a time-line!)