accounting help thank you!

Assume Time Warner shares have a market capitalization of $50 billion. The company is expected to pay a dividend of $0.45 per share and each share trades for $40. The growth rate in dividends is expected to be 7% per year. Also, Time Warner has $15 billion of debt that trades with a yield to maturity of 9%. If the firm's tax rate is 25%, what is the WACC? A) 8.59% B) 7.42% C) 7.81% D) 6.64%