Matlab no meshgrid function

Electric potential of two point charges The electric potential V around a charged particle is given by: 0.25 m 0,25 m ms, r 41 = 8.854187810-12 AC2 is the permittivity constant, q is the magnitude of the charge where Nm in coulombs, and r is the distance from the particle in meters. The electric field of two or more particles is calculated by using superposition. For example, the electric potential at a point due to two particles is given by 4TEO ( where q, ,q,, r , r, and are the charges of the particles and the distance from the point to the corresponding particle, respectively Two particles with a charge of qi-2 0~10 C and q2-3 * 10^-10 C are positioned in the xy plane at points (0.25, 0, 0) and (-0.25, 0, 0), respectively, as shown. Calculate and plot the electric potential due to the two particles at points in the x y plane that are located in the domain -0.2