Assume that at the instant the 60 mA dc current source is applied to the circuit in Figure P3, the initial current in the inductor is -45 mA, and the initial voltage on the capacitor is 15 V (positive at the upper terminal). Find the expression for i, (t) for t20 if R equals 200 2. 60 mA i(1) 350 mH Figure P3 0.2 F ZR