Given the following information for Electric Transport, find the WACC. Assume the company's tax rate is 35 percent. Debt:8,100, 6.9 percent coupon bonds outstanding. $1,000 par value, 17 years to maturity, selling for 101 percent of par, the bonds make semiannual payments. Common stock: 175,000 shares outstanding, selling for $77 per share, beta is 1.32. Preferred stock:9,000 shares of $7.50 preferred stock outstanding, currently selling for $73 per share. Market: 7.9 percent market risk premium and 3.6 percent risk-free rate.

how do I calculate the cost of debt and the cost of common stock?