Reddick Enterprises' stock currently sells for $35.50 per share. The dividend is projected to increase at a constant rate of 5.50% per year. The required rate of return on the stock, rs, is 9.00%. What is the stock's expected price 3 years from today?

I don't need the answer, but how you found the answer. Like if you rewrote the formula, please explain it. I am lost.