two charges, q1 and q2 are present on a normal coordinate system ,point A is located at the orgin, q1 has a charge of 1.11 nC and is 20 cm above point A and the orgin in the positive y direction, q2 has a charge of -1.11 nC and is 20 cm away from the orgin and point A in the negative x direction.
a) what is the magnitude and direction of the electric field at point A
b) what is the electric potential at point A