Solve the all parts of given problem:
Problem: Two identical conducting small spheres are placed with their centers 0.300 m apart. One is given a charge of -12.0 nC, and the other a charge of -14.0 nC.
Part A: Find the electric force exerted by one sphere on the other.
Part B: The spheres are connected by a conducting wire. Find the electric force between the two after they have come to equilibrium.
Please show all work and clearly explain.