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Calculate the current between points $A$ and $B$, where $$R_1 = 3\Omega$$ $$R_2 = 6\Omega$$ $$R_3 = R_4 = 4\Omega$$. Battery emf. Is 12 V. Neglect the internal resistance of the battery. Please see the photo: My attempt to solve it: I am stuck here should i add the two resultant resistanc...