Questions | Clean Uninstall of Plugin

Good Day,

In other topics, it was stated that to perform a clean unistall of this plugin all we have to do is deactivate and delete this plugin.

So, after deactivating and deleting this plugin:

1. Does any plugin information remain in our database? (e.g., Options table)
2. Are all previous plugin settings lost? (dumb question, but will ask anyway)
3. If using the Premium version of your plugin, are all WebP images and back-ups (i.e., back-up folder) deleted?

Thank you!