can you please solve this with an explanation

6) Julie has the choice to invest in City of Phoenix bonds or Tandem, Inc. corporate bonds that pay 9 percent interest. Julie is a single taxpayer who earns $70,500 annually. Assume that the City of Phoenix bonds and the Tandem, Inc. bonds have similar risk. What interest rate would the City of Phoenix have to pay in order to make Julie indifferent between investing in the City of Phoeniz and the Tandem, Inc. bonds for 2019? A. 7.22 percent B. 9.00 percent C. 7.02 percent D. None of the choices are correct E. 6.42 percent