A long wire carrying a 4.0 A current perpendicular to the xy-plane intersects the x-axis at x= -2. A second, parallel wire carrying a 2.5 A current...

A long wire carrying a 4.0 A current perpendicular to the xy-plane intersects the x-axis at x= -2.0cm. A second, parallel wire carrying a 2.5 A current intersects the x-axis at x=+2.0cm. At what point on the x-axis is the magnetic field zero if the two currents are in the same direction? At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?