Conducting planes at z= 2 cm and z = 8 cm are held at potentials of -3 V and 9 V, respectively. The region between the plates is filled with a perfect dielectric with e = 15 €0, voltage at z = 1CM -5 V 1 V -3 V -7 V

Hello Sir.Good Night. I have a question in my home work related Control System Lesson. The following below is my question.Please advise, Thank you so much.

The following elements are shown in the circuit in the figure R1 = 10, R2 = 10, R3 = 5 and R4 = 5, which must be calculated using the multiplication factor 1.2 [kQ]. It is also known that C1 = 6 [uF], C2 = 12 [µF], ɛ1 = 60 [V] and ɛ2 = 10 [V]. Considering that the switch closes at t = 0 [s] while the capacitors are found downloaded. Determine for a time equal to the time constant of the circuit (t = t [s]): a. The energy dissipated per second in resistor R1. b. The potential difference between points “a" and "d", that is, Vad. c. Graph and analyze the voltage of the capacitor from the moment the switch and considering that after 5 time constants it reopens and remains open. Consider that the capacitors begin to discharge when opening the switch.