Two charges g, and g, are located at the origin and at (0.50 m, O m), respectively. Where on the x axis must a third charge, g, of arbitrary sign be placed to be in electrostatic equilibrium if: a. g, and g, are like charges of equal magnitude (0.25 m, O m), b. g and g, are unlike charges of equal magnitude (no location exists), and c. gy =+3.0uCandgq, =7.0 uC (0.94 m to the right of q,)