A positive point charge $q_1 = 3.5 \, \mu C$ is located at $x = 0$, $y = 0.30 \, m$, a negative point charge $q_2 = -3.5 \, \mu C$ is located at $x = 0$, $y = -0.30 \, m$. A third point charge $Q = 5.0 \, \mu C$ is located at $x = 0.40 \, m$, $y = 0$.
