The equivalent for G₃ and G₄ is (for series)

1/G₃₄ = 1/G₃ + 1/G₄

G₃₄ = (2/3) S

Since G₁, G₂ and G₃₄ are parallel

G₁₂₃₄ = 2/3 + 2/3 + 2/3 = 2 S

I₁ = (G₁₂₃₄)(V) = (2 S)(2 V) = 4 amp (also = I₅)

I₂ = G₁V = (2/3 S)(2 V) = 4/3 amp

I₃ is the same as I₂

I₄ = G₃₄ V = (2/3)(2) = 4/3 amp

Check I₂ + I₃ + + I₄ = 4/3 + 4/3 + 4/3 = 4 amp = I₁

Answer is E

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