Hand written solution required

25. In the circuit of Figure P27.25, the switch S has been open V for a long time. It is then suddenly closed. Take & = 10.0 V, R = 50.0 ko, R, = 100 kf2, and C = 10.0 /F. Determine the time constant (a) before the switch is closed and (b) after the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. RI + C S