Point charge q1 = -5.00 nC is at the origin and point charge q2 = +3.00nC is on the x -axis at x = 3.00cm. Point P is on the y-axis at y = 4.00cm.
Part A: Calculate the electric fields E? 1 and E? 2 at point P due to the charges q1 and q2. Express your results in terms of unit vectors. (Express your answer in terms of the unit vectors i^, j^. )
Part B: Use the results of part (a) to obtain the resultant field E? at P, expressed in unit vector form. (Express your answer in terms of the unit vectors i^, j^.)