excel formula Please

Given the following information for Watson Power Co., find the WACC. Assume the company's tax rate is 21 percent. Debt. 10,000 6.4 percent coupon bonds outstanding, 51.000 par value, 25 years to maturity, selling for 108 percent of par; the bonds make semiannual payments. Common stock: 495,000 shares outstanding, selling for 563 per share, the beta is 1.115. Preferred stock: 35,000 shares of 3.5 percent preferred stock outstanding, currently selling for 572 per share Market: 7 percent market risk premium and 3.2 percent risk-free rate.