The z-component of the electric field along the z-axis, Ez (Z), is given for each charge as Esphere ( z) = k- (z > R) Eline (z) = k- Q 21/22 +12 Edisk (z) = 2k- V 2 + R 2 Consider a sphere of radius R, a plate of radius R, and a line of length L = 2 R, all with a charge +Q. Rank from smallest to largest the electric field due to each of the charges at the point on the z-axis, z = 2R