Ampere circuital law

A long straight wire of a circular cross-section of radius a carries a steady current I. The current is uniformly distributed across the cross-section. Apply Amperes circuital law to calculate the magnetic field at a point at distance r in the region for (i) rlta and (ii) rgta .

Ampere's circuital law is given by

State the modified Ampere's circuital law.

State Ampere's circuital law, expressing it in integral form.

What is the missing term in Ampere's circuital law?