Compute the each part of given question:
Question: A toroid having a square cross section, 6.00 cm on a side, and an inner radius of 18.0 cm has 350 turns and carries a current of 0.650 A. (It is made up of a square solenoid bent into a doughnut shape.)
Part I: What is the magnitude of the magnetic field inside the toroid at the inner radius?
Part II: What is the magnitude of the magnetic field inside the toroid at the outer radius?
Please Show each step and equations used in the above question.