In the capacitor network shown below, C = 6 F, C = 12 F, C3 = 6 F and C4 = UF. The network is connected across an applied voltage Vab. After the charges on the capacitors have reached their final values, the charge on C3 is Q3 = 206 C. a b The equivalent capacitance The charge, Q4 i) What is the equivalent capacitance of the network? The potential difference = = = ii) Calculate the following for capacitor C4: The stored energy in C4 = = C=6F C=12F C C3=6F C4=3F V UF HJ Calculate the energy density of capacitor C4 if a dielectric with a thickness of 1 mm and a relative permittivity & = 43 is now placed between its two plates. The energy density, u = J/m