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I need to see the formulas in order to understand the question

Do not use Microsoft Excel

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2. You are given the following information for Watson Power Co. Assume the company's tax rate is 40 percent. Debt: 5,000 7.8 percent coupon bonds outstanding, $1,000 par value, 20 years to maturity selling for 107 percent of par, the bonds make semiannual payments. 500,000 shares outstanding, selling for $68 per share; the beta is 1.11 28,000 shares of 3 percent preferred stock outstanding, currently selling for $88 per 9 percent market risk premium and 5.8 percent risk-free rate. Common stock: Preferred stock: Market: What is the company's WACC? (Do not round intermediate calculations. Enter yor answer asa percent rounded to 2 decimal places, e.g., 32.16.) WACC