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The circuit in the figure is composed of two batteries (ε1 = 8 V and ε2 = 5 V) and four resistors (R1 = 110 Ω, R2 = 40 Ω,R3 = 40 Ω, and R4 = 50 Ω) as shown.

550_The circuit in the figure is composed of two batteries.png

1) What is the current I1 which flows through R1?

2) What is the current I3 that flows through R3?

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