Two point charges are fixed on the y axis, a negative point charge q1 = −25 µC at y1 = +0.22 m and
a positive point charge q2 at y2 = +0.34 m. A third point charge q = +8.4 µC is fixed at the origin.
The electrostatic force exerted on the charge q by the other two charges has a magnitude of 27 N and
points in the +y direction. The magnitude of the charge q2 is