My brother wants to know writes...

Hi Greg :)
Hey, now that you let out that Donna Troy was once part of the team, my brother was excited to know that she was part of the team by the way XD I hope you can answer this cuestions :/

1. How old is Donna Troy in the year 2016? Or when she died? (if she is dead that is)
2. You may not know how to answer this or maybe it can be a spoiler request but: What happened to her that she was never mentioned in the show?
3. I doubt this but: Is Donna part of the League now?
4. Theres the leaguers 27 and 28 that are anknown yet. Were they suppose to be introduced in season 3?

I hope this aren't spoilers (though I think some definitelly can be) or questions to hard for you to answer!!