A red $2\mathrm{.}2$ m long straight wire carries a current of $1\mathrm{.}5$ A and the magnetic field it produced is balanced by the earths horizontal magnetic field of $2\mathrm{.}5$ mT$.$Determine the position of a point where it produces that magnetic field. If a $1\mathrm{.}7$ m long blue wire is placed at a middle of the point and the red  wire.

 calculate the magnetic field at that point due to both wires. The blue wire carries a current of $2\mathrm{.}5$ A in a same direction of red wire.