Magnetic field from loop current

The above left diagram shows a circular current with radius \(2r\) and current intensity \(I,\) flowing in the direction of the arrows. The above right diagram shows two concentric circular currents with radii \(r\) and \(2r,\) respectively, and the same current intensity \(I,\) flowing in the direction of their respective arrows. Points P and Q are the centers of their respective circular currents. If the magnetic field intensity at point P is \(B,\) then what is the magnetic field intensity at point Q?

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