Please answer it only if you are 100% sure with the right answer, thanks!

A coaxial cable consists of an inner wire the extends from the origin to 0.3 surrounded by an outer wire that goes from 0.3 to 1.1. The inner wire carries a total current of 3 A into the screen and the outer wires carries the same current back out of the screen. A person wants to know the magnetic field at r=O.15, and uses Ampere's Law. Since the wire is in essence a long cylinder, the Amperian path is a circle. What is the circumference of this circle? m What is the magnitude of the current enclosed in this circle? m What is the magnetic field at this point? T (note: counterclockwise is positive The person then wants to know the magnetic field at r=O.7. What is the circumference of the Amperian path? m What is the magnitude of the net current enclosed in this circle? m What is the magnetic field at this point? T (note: counterclockwise is positive