Can I get an explanation for the following problem?

1. Echo Company is a young start-up company.No dividends will be paid on the stock over the next 5 years because the firm needs to plow back its earnings to fuel growth. The company will then pay a dividend of $10 per share in year 6 and will increase the dividend by 5 percent per year thereafter.If the required return on this stock is 15 percent, what is the current stock value?