show calculations please

Ben may invest $100,000 in city of Raleigh bonds or in IBM, Inc. corporate bonds that pay 10% interest. Ben is a single taxpayer who salary of $100,000 and does not itemize his deductions. He does not have a dependent. Assume that the city of Raleigh bonds and the IBM bonds have similar risk. There is no state income tax. What interest rate would the city of Raleigh have to pay in order to make Ben indifferent between investing in the city of Raleigh and the IBM, Inc. bonds? a. 7.80 b. 10.00 c. 7.60 0.7.20 e. Other % % 2020 Tax Rate Schedules 0 Individuals Schedule X-Single Ir taxable income is over: But not over: The tax is: S $ 9,875 10% of taxable income $9.875 $ 40,125 5987.50 plus 12% of the excess over $9.875 $ 40,125 S 85.525 $4,617.50 plus 22% of the excess over $40,125 $ 85,525 S163,300 $14,605.50 plus 24% of the excess over $85.525 $163,300 $207,350 $33.271.50 plus 32% of the excess over $163,300 $207,350 SS18,400 S47,367.50 plus 35% of the excess over $207,350 $518,400 S156,235 plus 37% of the excess over $518,400