A source charge of )=(10-9𝐶 is located at the origin.

(a) Find the magnitude and direction of the electric field at point A which is located at (0𝑐𝑚,-5.00𝑐𝑚).

(b) A test charge of +3.00𝑛𝐶 is placed at 𝐴. Find the magnitude and direction of the electric force on the test charge. Do not use Coulomb’s Law; this should be a very simple calculation.