Answer:
(a) December 31, 2014.
Dr Cash 40,000
Dr Notes receivable 80,000
Cr Service revenue 102,049
Cr Discount on notes receivable 17,951
(b) December 31, 2016.
Dr Cash 20,000
Dr Discount on notes receivable 5,376
Cr Notes receivable 20,000
Cr Interest revenue 5,376
(c) December 31, 2018.
Dr Cash 20,000
Dr Discount on notes receivable 1,982
Cr Notes receivable 20,000
Cr Interest revenue 1,982
(d) December 31, 2015.
Dr Cash 20,000
Dr Discount on notes receivable 6,825
Cr Notes receivable 20,000
Cr Interest revenue 6,825
(e) December 31, 2017.
Dr Cash 20,000
Dr Discount on notes receivable 3,768
Cr Notes receivable 20,000
Cr Interest revenue 3,768