For the following list of activities, indicate using the following code what type of cash flow each activity relates to: O: operating, I: investing, F:financing, NC: Noncash investing or financing activity.

1.Purchase of land and building 2. Issuance of stock 3. Depreciation expense 4. Sale of land at book value 5. Sale of land at a gain 6. Payment of dividends 7. Purchase of available-for-sale debt investment 8. Increase in accounts payable 9. Loan from bank by signing note 10. Purchase of equipment using a note 11. Increase in inventory 12. Issuance of bonds 13. Decrease in accounts receivable 14. Redemption of bonds payable 15. Sale of equipment at a loss 16. Purchase of treasury stock