Chegg answer is 6.21 but that is not an answer listed on my multiple choice

Kayla is in the 28% federal income tax bracket and the 5% state income tax bracket. If Jennifer purchases a municipal bond yielding 4.25%, what is the equivalent yield on a taxable bond if the municipal bond income is exempt from both federal and state taxes?

Question 49 options:

A)

6.340%

B)

4.47%

C)

5.62%

D)

5.84%