1. The problem statement, all variables and given/known data
A point charge of -6 µC is located at x = 1 m, y = -2 m. A second point charge of 12 µC is located at x = 1 m, y = 3 m.

(a) Find the magnitude and direction of the electric field at x = -1 m, y = 0.


(b) Calculate the magnitude and direction of the force on an electron at x = -1 m, y = 0.


2. Relevant equations



3. The attempt at a solution

[tex]\Sigma_{F}= k\frac{-6 \mu C}{8} + k\frac{12 \mu C}{13} = 1.08e4 \frac{N}{C}[/tex]


That's for the magnitude part of A. I've already submitted to many incorrect responses, but I would like to know how to do it. Thanks ahead of time.