Calculate the magnitude and direction of the electric field (in N/C) 3.6 m from a long wire that is charged uniformly at λ = 3.9 µC/m. (Assume the wire goes through the origin, and the point in question is located on the z-axis. Express your answer in vector form)
a) 0.286 N/C in the positive z-direction
b) 0.571 N/C in the positive z-direction
c) 0.286 N/C in the negative z-direction
d) 0.571 N/C in the negative z-direction
