Before to = Os the key stayed open and there was a steady state in the following circuit. At to the key was toggled (switched to "close" position). Find and draw waveform u(t) in the follwing circuit....

Extracted text: Before to = Os the key stayed open and there was a steady state in the following circuit. At to the key was toggled (switched to "close" position). Find and draw waveform u(t) in the follwing circuit. Data: E = 6 V, J = 4mA, R1 = 2 k, R2 = 1 kſN, R3 = 3 kN, C = 4 µF. R2 R1 to , u(t)R3 E