Compute the all parts of given question:
Question: Two equal positive charges of magnitude q1 = q2 = 1 nC are on the y axis at y1 = +3 cm and y2 = -3 cm.
Part I: What is the magnitude and direction of the electric field on the x axis at x = 3 cm?
Part II: What is the force exerted on a third charge q0 = 1 nC when it is placed on the xaxis at x = 3 cm?
I need help to solve the each part of above question. Thanks.