A parallel-plate capacitor with circular plates has a steady charging current of \(3.0 \mathrm{~A}\). The wires into and out of the plates attach to the plate centers. If the radius of each plate is \(5 \mathrm{~cm}\) and there is no dielectric between the plates, what is the magnetic field magnitude inside the plates at a distance of 

(a) \(2 \mathrm{~cm}\)

(b) \(10 \mathrm{~cm}\) from the symmetry axis of the capacitor?