Please help me solve this by hand without the use of excel.

The company has 100,000 bonds with an 15% coupon rate, payable semiannually, 20 years to maturity, selling at $1,125 per bond. The company also has 1,500,000 shares of common stock outstanding. The stock sells for a price of $67 per share and has a beta of 1.8. Additionally, the company has 200,000 preferred shares outstanding, currently trading at $103 per share; with an annual dividend payment of $5.96. The market risk premium is 5% and the risk free rate is 3.2%. The tax rate is 21%.

What is the before-tax cost of debt?

What is the after-tax cost of debt?

What is the cost of preferred stock?

What is the cost of common stock?

What is the weighted average cost of capital?