Question 3 (2.5 pts) : Find vx(t), t ≥ 0 for L1 = 20 mH, L2 = 80 mH, C3 = 10 mF, C4 = 90 mF, R5 = 2 Ω, I6 = 1 A. The initial currents of the inductors are i1(0) = 0.2 A, i2(0) = 0.4 A, and the initial voltages of the capacitors are v3(0) = 2 V, v4(0) = 1 V.