Creating notifications plugins

We use User Notification widget these days to have more visibility in the platform, specially for Forum Thread activities. On of the things we found very useful is when a user can get a notification every time a forum thread is verified, however, there's a step in the middle, which is the Suggested Answer. I saw there is no notification for that event and I was wondering if we could create a custom one using an INotificationType  plugin. So, couple of questions here:

  1. Is is possible to create a custom notification for Suggested Answer?
  2. If #1 is possible, could you give me some insights on which event should we use, like in Verint's sample, for a new comment event, we need to use Apis.Get<IComments>().Events.AfterCreate

Thanks in advance, we are running 13.0.2.33658 version.