Figure a below shows twoconcentric circular regions in which uniform magnetic fields canchange. Region 1, with radius r1 = 1 cm, has anoutward magnetic field Bvec1 that isincreasing in magnitude. Region 2, with radiusr2 = 2 cm, has an outward magnetic fieldBvec2 that mayalso be changing. Imagine that a conducting ring of radiusR is centered on the two regions and then the emfscript e around the ring isdetermined. Figure b gives emf script e as afunction of the square R2 of the ring's radius,to the outer edge of region 2. The vertical axis scale is set byscript es =24 nV.

(a)What is the ratedB1/dt?

(b)What is the rate dB2/dt?

(c) Is the magnitude of Bvec2 increasing,decreasing, or remaining constant?