Three resistor R1 = 6 ohms, R2 = 3 ohms R3 = 2 ohms, and current source E1 = 2.2 V are connected as shown in Fig. Determine the emf E source which should be connected in circuit between points A and B so that the conductor resistance R3 was a current of I3 = A 1 in the direction indicated by the arrow. The internal resistance of the current sources neglected.

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