please help on excel. thank you!

5. The Alpha Energy Company just paid a dividend of $1 per share (t = 0). The dividend is expected to grow at a rate of 25% per year for the next three years (t =1, 1 =2, 1 =3), and to level off to 5% per year forever. You think the appropriate discount rate is 20% per year. a. [10 points] What is your estimate of the value of a share of the stock (t = 0)? b. [10 points) If the market price of a share is equal to your estimated value, what is the expected dividend yield? c. [10 points] What do you expected its price to be two year from now (1 =2) d. [10 points]What is the expected annualized return of a share from now 1 =0 to 1 =2? How does it compare to the discount rate? Is it different? Why