A very long uniform line of charge has charge per unit length λ1 = 4.70 μc/m and lies along the x-axis. A second long uniform line of charge has charge per unit length λ2 = -2.48 μc/m and is parallel to the x-axis at y1 = 0.400 m. What is the magnitude of the net electric field at point y3 = 0.600 m on the y-axis?