Particle 1 carrying charge 4q is fixed at the origin of an xy coordinate system, and particle 2 carrying charge q is fixed at (0, 0.12 m ). Particle 3 carrying 2.4 μC of charge can move along the y axis. This particle experiences zero electric force when at y = 0.080 m and an electric force of 126.4 N ȷ^ when at y = 0.040 m.

Part A

What is the value of q?

q =