Solve the all parts of given question:
Question: Two small identical conducting spheres are placed with their centers 0.65 m apart. One is given a charge of 1.2e10-8 C, the other a charge of -1.6e x 10-8 C.
Part A: Find the electrostatic force exerted on one sphere by the other.
Part B: The spheres are connected by a conducting wire. Find the electrostatic force between the two after equilibrium is reached, where both spheres have the same charge.
Please do a step by step solution since I'm kind of lost with this question.