Consider two isolated, charged conducting spheres. One is a large sphere, and the second is smaller with a radius four times smaller than that of the large sphere but with four times as much charge. We denote the potential of the large sphere by V_L and the electric field at its surface by E_L. The corresponding quantities for the smaller sphere are V_S and E_S.

(a) Compute the ratio E_L/E_S. 

(b) Find V_L/V_S.