Please give me the suitable answer of following problem-

Problem- A patient is placed into a mri tunnel that is 0.40 m in diameter and 1.00 m long. a 200 a current creates an approximately uniform magnetic field inside the mri tunnel.

Part A- To carry such a large current, the wires shown as cross sections, with current from the array of wires running out-of and into-the page, respectively are cooled with liquid helium until they become superconducting. The amount of magnetic energy stored in the mri tunnel is on the order of 2.5 x 106 j.

Part B- Calculate the number of turns of wire necessary to accomplish this.

I need help to compute the above problem.