A $0\mathrm{.}220-$ A current is charging a capacitor that has circular plates $13\mathrm{.}8$ cm in radius. The plate separation is $4\mathrm{.}00$ mm $.$

$($a$)$ What is the time rate of increase of electric field between the plates?

$\frac{V}{m*s}$

$($b$)$ What is the magnetic field between the plates $5\mathrm{.}00$ cm from the center?

$8\mathrm{.}80e-07$