Consider the following scenarios for an online project management tool and decide which are best suited for the implementation of product walkthroughs and tutorials:
- Scenario I: Despite adding new collaboration features, there's no significant change in user engagement or project creation rates.
- Scenario II: New users frequently abandon the tool soon after registration, indicating difficulty in understanding its project planning features.
- Scenario III: Regular users request detailed guides on optimizing workflows and advanced project tracking functionalities.
- Scenario IV: There's an influx of support tickets from users unsure how to set up their first project or team collaboration space.