The switch is closed and this circuit's capacitor is allowed to fully charge. After the capacitor is fully charged, find (a) the current flowing through R, and (b) the voltage across the capacitor. () Now, the switch is opened and the capacitor is allowed to discharge through the resistors. How long does it take the current through R, to drop to half'its initial value if C'=12.0 pF? All answers should be given to three significant figures