Dear experts

I find it very confusing to calculate the cost of debt for this question. Please show me the workings of calculating the cost of debt.

1. The Basket Weavers Company has 100,000 bonds outstanding that are selling at $1000 par value. Bonds with similar characteristics are yielding 7.5 percent. The company also has 1 million shares of 10.5 percent preferred stock outstanding with $100 par value and 5 million shares of common stock outstanding. The preferred stock sells for $56 per share. The common stock has a beta of 1.2 and sells for $38 a share. The U.S. Treasury bill risk free rate is yielding 3 percent and the return on the market is 12 percent. The corporate tax rate is 34 percent. What is Basket Weaver's weighted average cost of capital