The figure below shows the electric field lines for three point charges which are positive and negative as indicated, (a) Use the compass directions

The figure below shows the electric field lines for three point charges which are positive and negative as indicated, (a) Use the compass directions to indicate the direction of the force that a positive test charge would experience from the electric field vector at points 1, 2, 3, and 4 on the diagram. (b)If the central charge is + 1.0uC, what are the values of the outer charges?