Answer:
the diagram is in the attached file. FN is the normal force, Fe is the electric force and Fg is the force of gravity.
Step-by-step explanation:
According to Newton's Third Law, also called the Principle of Action and Reaction, which says that if a body A exerts an action on a body B, it will perform on A body the same and in the opposite direction, in this case, the magnitude of the electrical forces are equal but opposite, that is, of opposite sign. The exercise does not provide the information to be able to compare the vertical forces with the electrical one, it can be assumed that since the spheres are in equilibrium, the vertical forces are equal to zero.