Indicate whether each of the following assets and liabilities typically should be classified as current or long-term:

(a) Accounts receivable within the next 60 days; 

(b) Prepaid rent for the next six months; 

(c) Notes receivable due in two years;

(d) Notes payable due in 90 days; 

(e) Notes payable due in five years; 

(f) Patent with 12-year remaining legal life.