Plz help with explaining

A charge Q = 10-10 C is uniformly distributed on the surface of sphere of radius R= 10cm. What is the valued of the electric field E and the electrostatic potential at 71 = 7, 12 = R, 3 = 2R from the center of the sphere? Edit View Insert Format Tools Table 12pt Paragraph BIUA &V T V EVE To BB V Vx