Answer:
a. Taxable equivalent yield:
Municipal bonds are tax free so if they are to be compared with bonds where you have to pay taxes, the following formula is used:
= Municipal interest / ( 1 - tax rate)
= 3.10 / (1 - 28%)
= 4.31%
b. Annual amount of interest received:
= Coupon rate * Face value
= 5.8% * 1,000
= $58