3.16 billion in total debt (which approximates its market value). Interest expense for the year was about $214.0 million. The companys market capitalization is approximately $1.17 billion, its market beta is 2.65, and its assumed tax rate is 37%. Assume that the risk-free rate equals 2.5% and the market premium equals 5%

a) cost of debt capital?

b)Estimate US Steel's cost of equity capital

c) estimate US Steel's weighted average cost of capital