Al is retired and his sole source of income is his bond portfolio. Although he has sufficient

principal to live on$,$ he only wants to spend the interest income and thus is concerned about the

purchasing power of that income. Which one of the following bonds should best ease Al's

concerns?

$6-$year coupon bonds

$5-$year TIPS

$20-$year coupon bonds

$5-$year municipal bonds

$7-$year income bonds