Here's the exact question. really, i just cant evenunderstand the setup of the problem, so i cant draw a picture, orknow how to approach it. any insight would be appreciated,! a small solid conductor with radius a is supported by insulating, nonmagnetic disks onthe axis of thin-walled tube with inner radius b. the conductors carry equal currents i in opposite directions. part a) use ampere's law to find the magnetic field at any point inthe volume between the conductors. express your answer in terms of thevariables i, r, and appropriate constants. b(r) = ? part b) use the energy density for a magnetic field, equationu=b^2/2 \mu_0, to calculate theenergy stored in a thin, cylindrical shell between the twoconductors. let the cylindrical shell have inner radius r, outer radius r + dr, and length l. express your answer in terms of thevariables i, r, l, dr, and appropriate constants. du = ? part c)integrate your result in part b over the volume between thetwo conductors to find the total energy stored in the magneticfield for a length l of the cable. express your answer in terms of thevariables i, b, l, a, and appropriate constants. u = ? part d) use your result in part c and equation u=1/2 l i^2 to calculate theinductance l of a length l of the cable. l = ?