Solve the all parts of given problem:
Problem: Point charge 2.0 µC is located at x = 0, y = 0.30 m, point charge -2.0 µC is located at x = 0 y = -0.30 m.
Part A: What is the magnitude of the total electric force that these charges exert on a third point charge Q = 5.0 µC at x = 0.40 m, y = 0.
Part B: What is direction of the total electric force that these charges exert on a third point charge Q = 5.0 µC at x = 0.40 m, y = 0?
I am having a hard time understanding this problem. So if you answer please explain how you found the answer.