Two long, straight, parallel wires are 1.00 m apart (Fig. P28.63). The wire on the left...

Two long, straight, parallel wires are 1.00 m apart (Fig. P28.63). The wire on the left carries a current I₁ of 6.00 A into the plane of the paper. (a) What must the magnitude and direction of the current I₂ be for the net field at point P to be zero? (b) Then what are the magnitude and direction of the net field at Q? (c) Then what is the magnitude of the net field at S?