A $-$You are in the $30\%$ marginal tax bracket and are evaluating a tax$-$exempt bond with a yield of $6\%$ and a corporate, taxable bond with a yield of $8\%.$ Assuming the bonds are identical in all respects except for their tax status, what is the taxable equivalent yield and which bond do you prefer? $($You must answer both parts to get credit$).$

B $-$ Your marginal tax bracket has increased to $35\%,$ what is the taxable equivalent yield and does this change your preference? $($Again$,$ must answer both parts to get credit.$)$