Doug is in the 30% tax bracket and he is considering investing in a corporate bond with 10.5% bond yield and a muni with 7.6% yield. What is the tax-cutoff?

[ Select ] ["27.62%", "24.55%", "22.89%", "32.82%", "28.17%"]

What should Doug do? [ Select ] ["Invest in the corporate bond", "Invest in the muni", "He is indifferent between the two"]