The figure below shows a long conducting coaxial cable and gives its radii (R1=0.12m, R2=0.69m, R3=1.16m). The outer cable has a uniform current density of J=213A/m², and the inner cable carries a current I=23.7A flowing in opposite direction. Assume that the currents in each wire is uniformly distributed over its cross section. Determine the magnitude of the magnetic field in terms of He at a distance r=0.82m from the center of the cable. Express your answer using one decimal place.

The figure below shows a long conducting coaxial cable and gives its radii (R1=0.12m, R2=0.69m, R3=1.16m). The outer cable has a uniform current density of J=213A/m², and the inner cable carries a current I=23.7A flowing in opposite direction. Assume that the currents in each wire is uniformly distributed over its cross section. Determine the magnitude of the magnetic field in terms of He at a distance r=0.82m from the center of the cable. Express your answer using one decimal place.