Solve the all parts of given problem:
Problem: A long wire carrying a 6.0A current perpendicular to the xy-plane intersects the x-axis at x= +2.0cm. A second, parallel wire carrying a 3.0A current intersects the x-axis at x= +2.0cm.
Part I: At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?
Answer in cm
Part II: At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?
Answer in cm
Please show all work so I can fully understand all concepts!