Hui is currently considering investing in municipal bonds that earn $4\mathrm{.}50$ percent interest, or in taxable bonds issued by the Coca$-$Cola Company that pay $6\mathrm{.}00$ percent.

Required:

If Hui's tax rate is $22$ percent, which bond should he choose?

Which bond should he choose if his tax rate is $32$ percent?

At what tax rate would he be indifferent between the bonds?

What strategy is this decision based upon?