3. The switch has been closed for a long time. At t=0, the switch is opened. a. Determine the initial voltage across the capacitor, Vo. (Voltage prior to switch opening) b. Determine the steady state voltage across the capacitor, Vs. (This is the voltage when switch has been open for long time.) c. Determine the time constant. d. Approximately how much time for the capacitor's voltage to fall below 1% of Vo? e. Write the time dependent equation for the voltage across Cl