Current flows in a semi-infinite

1) A current I flows in a semi-infinite straight wire along y = 2b, z = 0 from very large positive values of x to the point (0,2b,0), then around a semicircular wire centered upon (0,b,0) and in negative values of x in the z = 0 plane to the point (0,0,0), then along a second semi-infinite straight wire along y = 0, z = 0 from the point (0,0,0) to very large positive values of x. Find the magnetic field produced at the point (0,b,0). What are their individual directions?2) A current I flows clockwise in a square loop of side w located with corners at (0,0,0), (0,w,0), (w,w,0), and (w,0,0) (in cartesian) . Find the magnetic field produced at the point (w/4,w/2,0).