Answer:
1) February 1, 2019, service revenue
Dr Notes receivable 135,000
Cr Service revenue 135,000
2) if the note is collected on December 1, 2019, the amount of interest revenue = $135,000 x 11% x 10/12 months = $12,375
3) December 1, 2019, note receivable and interest collected
Dr Cash 147,375
Cr Notes receivable 135,000
Cr Interest revenue 12,375