Facebook company paid a dividend of $$3$ this year. The company is expected to pay $$4,5$$ and $$10$ of dividends for the upcoming $3$ years. Then it will enter a constant growth period. The plowback ratio of the company is $0\mathrm{.}40$ and it has a return of equity $($ROE$)$ ratio $15\%.$ If the required return on the company is $7\%,$a$.$ What is the current dividend yield of the company?b$.$ What is the horizon value of the company? c$.$ What is the value of each common stock of the company?