Two point charges A and B are separated by a distance 2R. Th…

Two point charges A and B are separated by a distance 2R. The magnitude of the electric force exerted on charge B by charge A is 2 N. Another pair of point charges, C and D, are separated by a distance R. What is the magnitude of the electric force exerted on charge D by charge C (in N)? The values of the charges are labeled in the figure.