Can someone actually explain how to do the second part. not just give a graph with no explanation. thanks

A bond is issued on January 1, 2019 when the market rate was 5% with the following terms: Par: $50,000 Coupon Rate: 4% Maturity Date: December 31, 2023 Annual Coupon Payments What is interest expense for the year ended December 31, 2020? a) $47,835 b) $2,392 c) $2,411 d) $2,000 e) None of the above What is the balance in the Bonds Payable account after the coupon is paid on December 31, 2020? a) $47,835 b) $48,227 c) $50,000 d) $48,638 e) None of the above