Consider a charge 1( 5.0C) fixed at a site with another charge 2 (charge 3.0C , mass 6.0g) moving in the neighboring space. (a) Evaluate the potential energy of 2 when it is 4.0 cm from 1. (b) If 2 starts from rest from a point 4.0 cm from 1, what will be its speed when it is 8.0 cm from 1 ? (Note: 1 is held fixed in its place.)