I need correct work to these answers

5) a) C = 34.67 pF U = 1.40 nJoules u = 89.33 Joules/m3 b) C = 66.89 pF U = 2.71 nJoules u = 172.38 Joules/m3 c) C = 111.05 pF U = 4.50 nJoules u = 89.48 Joules/m3 With Dielectric C = 210.53 pF U = 8.53 nJoules u = 169.63 Joules/m3

5) A spherical capacitor of inner radius .024 meters and outer radius .026 meters is connected to a 9 volt battery. a) Calculate its Capacitance (C), Potential Energy (U), and Energy Density (u). b) Calculate the above quantities if a dielectric material of constant = 13.6 is filled between the spheres from r = .024 m to r = .025 meters. c) Answer the above questions if the capacitor is a cylindrical capacitor with the same radii and length l = .16 meters