A point charge of 5.6 μC is placed at the origin (x1 = 0) of a coordinate system, and another charge of –2.7 μC is placed placed on the x-axis at x2 = 0.23 m.

1) Where on the x-axis can a third charge be placed in meters so that the net force on it is zero?

2)What if both charges are positive; that is, what if the second charge is 2.7 μC?