Practice Problem 3.2 ΖΩ ww ix 4Ω 4ix 1 3Ω ww 2 4A④ Figure 3.6 For Practice Prob. 3.2. 3 6 Ω Find the voltages at the three nonreference nodes in the circuit of Fig. 3.6 Answer: v₁ = 32 V, v₂ = -25.6 V, V3 = 62.4 V.