Consider the situation depicted below, where three closely spaced wires are carrying currents of magnitudes i = 1.2 mA, i2 = 4.1 mA and iz = 1.9 mA, with directions either into the page or out of the page, as indicated in the figure. In one of the points the magnetic field is measured to be B = (-9.2î + 4.6ĵ) (units μΤ) In which of the points indicated in the figure was this magnetic field measured?
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