The figure below shows a long conducting coaxial cable and gives its radii (R1=0.21m, R2=0.55m, R3=1.19m). The outer cable has a uniform current density of J=208A/m2, and the inner cable carries a current /=29.1A 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 Ho at a distance r=0.9m from the center of the cable. Express your answer using one decimal place. R2 Ra