A point charge of -4.00 is at the origin, and a second point charge of 6.00 is on the axis at = 0.850 . Find the magnitude and direction of the electric field at each of the following points on the axis.
a) x=25.0cm
b) x=1.10m
c) x=-15.0cm
a) x=25.0cm
b) x=1.10m
c) x=-15.0cm