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The coil in the figure carries current i = 2.24 A in the direction indicated, is parallel to an xz plane, has 3 turns and an area of 4.02 x 10-3 m2, and lies in a uniform magnetic field B = (2.09 7 - 2.01 j - 4.83 k) mT. (a) What is the magnetic potential energy of the coil-magnetic field system? (b) What is the magnetic torque (in unit-vector notation) on the coil? X 2