Assume that JCT Inc. issue 30-year bond paying a 6% annual coupon. Expected price to be paid by the investors is $910. The expected flotation cost per bond is $41, and the firm is in the 35% tax bracket.

Compute the following: a. the yield to maturity on the firm's bonds

b. the firm's after-tax cost of existing debt

c. the firm's after-tax cost of new debt

Need to solve a, b and c

Please do not use excel, need to show calculation?