Jack's Construction Co. has 100,000 bonds outstanding that are selling at par value. The bonds yield 9.0 percent. The company also has 3.5 million shares of common stock outstanding. The stock has a beta of 1.6 and sells for $45 a share. The U.S. Treasury bill is yielding 6 percent and the market risk premium is 9 percent. Jack's tax rate is 25 percent. Calculate the following:

The after tax cost of debt

The cost of equity

The weight of debt and the weight of equity

The weighted average cost of capital for Jack's construction