Two infinitely long straight parallel wires perpendicular to the plane of the paper are $$5\,\text{m}$$ apart. One of the wires, $$P$$, carries current $$I$$ out of the plane of the paper and the other, $$Q$$, carries the current $$I$$ into the plane of paper. The magnetic field $$B$$ at the origin $$O$$ of the coordinate system with $$x$$ and $$y$$ axes as perpendicular and parallel to $$PQ$$, respectively, is. Given $$OP = 4\,\text{m}$$ and $$OQ = 3\,\text{m}$$.