please explain and show how you got to your answer

Assume that the average firm in your company's industry has a required rate of return of 10%. Your company is about as risky as the average firm in the industry, but it has just successfully completed some R\&D work which leads you to expect that its earnings and dividends will grow at a rate of 40% this year and 25% the following year, after which growth should match the 6% annual industry average growth rate. The last dividend paid (D0) was $1.2. What is the fair value of your firm's stock at time 0