Expected journeys notifications behavior

Summary:

How do checklist notifications get triggered when:

1. The Combine task notification is enabled and owner of tasks is somebody other than initaitor?
2. Does Combine task notification combine ALL task colsure notifications as well or only task assignment notifications
3. When Task notifications are enabled and checked and also combine notification is checked.

Is there a standard documentation that can be referred to understand the behavior in different scenarios?

Content (required):

Checklist task notifications behavior.

Version (include the version you are using, if applicable): 23B

Code Snippet (add any code snippets that support your topic, if applicable):