A charge + 196 nC sits at the origin (x,y = 0,0). You bring in a series 4 charges each of the same + 196 nC charge from a distance very far away. The charges are brought to positions (in x,y format) (-3.4,-3.4), (-3.4,3.4), (,(3.4,-3.4) (where the distances are in cm) and fixed in place. The central charge is then released. What is it's kinetic energy when it is far away from the charge distribution.

Fig: 1