A uniformly charged solid disc lies in the xz plane, centered about the origin as illustrated in the figure below. The radius of the disc is denoted by a and the positively charged disc has a total charge Q. Determine the equation for the electric potential at the point p in terms of Q, a, p, and the appropriate constants and direction. P a V = Q 2 TEOa 2 (Vp2 + a2 -p)