Solving a problem in physics section 1 point 14 electro

14. The free charges are evenly distributed with volume density ρ = 5 nC / m3 over the ball of radius R = 10 cm of uniform isotropic dielectric with permittivity ε = 5. Determine the intensity of the electrostatic field E at distances r1 = 5 cm and r2 = 15 cm from the center ball