Consider in a homogeneous medium of relative permittivity μr​ a straight wire of length L that carries a constant current I. The wire is oriented along the z-axis and its ends are located at the points (x,y,z)=(0,0,−a) and (x,y,z)=(0,0,−a−L). (30 pts) a. Determine the magnetic induction field at a point along the y-axis, i.e., find B
(0,y,0). (10 pts) b. Determine the magnetic field H
(0,y,0) every where