Please show equations and the work that was used to solve the problem.

Question 18 O pts Afirm expects to increase its annual dividend by 20 percent per year for the next two years and by 15 percent per year for the following two years. After that, the company plans to pay a constant annual dividend of $3 a share. The last dividend paid was $1 a share. What is the current value of this stock if the required rate of return is 12 percent? $18.97 $20.50 $21.08 O $21.69