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Long problem [5 marks]. In the figure below, wire A carries a 2.0 A current into the page and wire B carries a 1.0 A current out of the page. Wire A is 1 cm from the origin O on the x axis, and wire B is 3 cm from the origin, also on the x axis. Find the magnitude and direction of the magnetic field at the origin O (0,0), and at point P (2 cm, 0), i.e. the midpoint between the two wires. y A B P O X