There are five styrofoam balls, A through E, all of which can be brought near each other. Determine which balls are positively charged, which are negatively charged, and which are neutral if: 1. Balls A and C feel no forces between each other, but both are attracted to B. 2. Ball D is attracted to B, but repelled by E. 3. Ball D repels a beam of electrons coming from inside a cathode ray tube television.