Presented below is a list of accounting transactions for the Davis Company. Classify each of the transactions as an operating (O) activity transaction, an investing (1) activity transaction, a financing (F) activity transaction, or as none-of-the-above (N).

1. Purchase of machinery for cash 

2. Cash payment on loan principal 

3. Collection of cash on outstanding accounts receivable 

4. Payment of a stock dividend 

5. Sale of preferred stock for cash 

6. Prepaid the office rent for six months 

7. Cash payment of income tax expense 

8. Sale of land held as an investment for cash 

9. Declared (but did not pay) a cash dividend 

10. Purchased treasury stock using cash