Calculate stock price today, given the following assumptions:

Dividends grow at 9% for t=1, 2 year

At the start of year 3, growth slows to 5%

A dividend paid already at year t=0 was $10

A discount rate is 11%

A) $182 B) $171 C)$101 D) none of them

Correct answer is 171, how? Explain and show formulas, please