Over a certain region of space, the electrostatic potential pattern is described by function Ï(x, y,z) = C(x^3â2x^2y + 3xz^2 â 2y^2z)

where constant C=38.36 V/m^3, and x, y and z are the Cartesian coordinates of the points within that region. We are interested in the pattern of the electric field E(x, y,z) that corresponds to the given potential. Find the electric field at point A given by its coordinates (x, y,z)= (8.4,-3,-7.9) cm in terms of its Cartesian components: V/m, Ex= Ey= Ez= V/m, V/m.

Required:
What is the magnitude E of the electric field at point A?