Two particles are fixed on an x axis. Particle 1 of charge 40C is located at x

Two particles are fixed on an x axis. Particle 1 of charge 40μC is located at x = – 2.0 cm; particle 2 of charge O is located at x = 3.0 cm. Particle 3 of charge magnitude 20μC is released from rest on the y axis at y = 2.0 cm. What is the value of Q if the initial acceleration of particle 3 is in the positive direction of?
(a) The x axis and
(b) The y axis?