Final answer:
Accounts receivable is a current asset, prepaid rent is a current asset, note receivable is a noncurrent asset, note payable is a current liability, note payable is a noncurrent liability, and the classification of a patent depends on its useful life.
Step-by-step explanation:
(a) Accounts receivable: Accounts receivable should be classified as a current asset since they are expected to be collected within one year.
(b) Prepaid rent for the next six months: Prepaid rent should also be classified as a current asset since it will be used up or expired within one year.
(c) Note receivable due in two years: Note receivable should be classified as a noncurrent asset since it is not expected to be collected within one year.
(d) Note payable due in 90 days: Note payable should be classified as a current liability since it is expected to be paid within one year.
(e) Note payable due in five years: Note payable should be classified as a noncurrent liability since it is not expected to be paid within one year.
(f) Patent: The classification of a patent depends on its expected useful life. If the patent has a useful life of less than one year, it should be classified as a current asset. If the patent has a useful life of more than one year, it should be classified as a noncurrent asset.