Explanation:
You can see the way to use The Sentiment Analysis model in both Power Apps and Power Automate.
https://docs.microsoft.com/en-us/ai-builder/prebuilt-sentiment-analysis

Explanation:
https://docs.microsoft.com/en-us/power-automate/triggers-introduction
https://docs.microsoft.com/en-us/power-automate/business-process-flows-overview

Explanation:
https://docs.microsoft.com/en-us/power-bi/collaborate-share/service-create-distribute-apps

Explanation:
Box 1: No
You already have this access as a System Administrator.
Users who have the Environment Maker, System Administrator, or System Customizer security role can access and edit all model-driven apps within the environment. This is because these security roles have create, read, and write privileges on the Model-driven App table.
Box 2: Yes
If you are the System Administrator role in your CDS (Common Data Service), you would have full permission to customize or administer the environment, including creating, modifying, and assigning security roles.
Currently, within PowerApps, there is no way to prevent CDS System Administrator role from deleting a record in an Entity.
Box 3: No
Other security options are available.
Also, there is no information on what the custom Project Team Member role entails.
Note: Apps can be viewed by valid users with appropriate privileges who sign into Power Apps, the Power Apps mobile app, or Dynamics 365 home page. For a user to view and access apps in an environment, the following privileges, security role, or team membership are required:
- A user who has the write or create privilege on the Model-driven App table makes the user a maker persona. That user can view and access all apps in the environment.
- A user who has only the read privilege on the Model-driven App table, must also have the associated security role(s) that are assigned to the app (or equivalent).
Reference:
https://docs.microsoft.com/en-us/power-apps/maker/model-driven-apps/app-visibility-privileges
https://docs.microsoft.com/en-us/power-platform/admin/database-security