Five Styrofoam balls are suspended from insulating threads. Several experiments are performed on the balls and the following observations are made          i) Ball A repels C and attracts B          ii) Ball D attracts B and has no effect on E          iii) A negatively charged rod attracts both A and E An electrically neutral Styrofoam ball gets attracted if placed nearby a charged body due to induced charge. What are the charges, if any, on each ball A, B, C, D and E?