As shown in the figure, a wire is bent into the shape of a tightly closed omega, with a circular loop of radius 4.0 cm and two long straight sections. The loop is in the xy-plane, with the center at the origin. The straight sections are parallel to the x-axis. The wire carries a 5 A current, as shown. What is the magnitude of the magnetic field at the center of the loop?
(a) 54 μT
(b) 104 μT
(c) 80 μT
(d) 40 μT
(e) 25 μT
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