Answer:
1. Purchase of a patent - Investing activities
2. Depreciation expense - Operating activities
3. Issuance of a note payable - Financing activity
4. Increase in inventory - Operating activity
Step-by-step explanation:
Operating activity of cash flows include cash inflows and cash outflows from day to day business activities. This includes cash flows use from ongoing business activities.
Investing activity of cash flows includes cash inflows and cash outflows from investments of the business. This includes purchase of assets, sale of assets, investment in securities.
Financing activity of cash flows include cash inflows and cash outflows to fund the company. The activities that are incurred to fiance the business are classified as financing activity.