determine the current through the capacitor, i_c(t) for time t greater than or equal to zero if the following statements apply.
1. Vc(t=0) = 5V
2. The switch is closed from t = - infinity to t = 0.2 seconds, when it opens.
3. u(t) is the unit step function
4. u(t - 0.2) is the unit step function with time delay 0.2 seconds