Hello. After watching the entire Eva series and movies
     (again),I was wondering how much is known about the series, and how
     much we make up. Things like:


         1. Is Rei really a mix of Shinji's mom Yui and an ANGEL? If so,
     where in the series is this stated?

         2. Who really killed Kaji? And,

         3. Was Ritsuko "knocking boots" with Gendo?

     Thanks for your time.