For each event listed below, select the appropriate category which describes the effect of the event on a statement of cash flows. Use the abbreviations provided. Operating activities (O). Investing activities (I). Financing activities (F). Noncash activity (N). __a. Repayment of long-term debt ____ b. Amortization expense on patents ____ c. Sale of goods on account ____ d. Cash dividend payment to investors ____ e. Issuance of stock to acquire land ____ f. Sale of securities (long-term) ____ g. Payment of employees' wages ____ h. Purchase of bonds of another company ____ i. Purchase of equipment ____ j. Purchase of treasury stock (common)