Bond B$,$ issued by the Town of Blacksburg, pays a $3\mathrm{.}5\%$ interest rate that is fully tax$-$exempt. Bond C $,$ issued by a corproation $,$ pays interest at $6\%$ and is entirely taxable. Bond G$,$ issued by the U$.$S$.$ government, pays interest at $5\%$ and is entirely taxable. Bond B and Bond G have identical risk. Bond C is more risky than the other bonds. On all other dimensions $($eg$,$ maturity$)$ the three bonds are identical $,$ and all three bonds trade at face value. What is the implicit tax rate on Bond B$?25\%30\%41\mathrm{.}67\%42\mathrm{.}86\%$