A uniformly charged disk with radius

R $=25\mathrm{.}0$ cm

and uniform charge density

$=6\mathrm{.}10103$ C$/$m$2$

lies in the xy$-$plane, with its center at the origin. What is the electric field $($in MN$/$C$)$ due to the charged disk at the following locations?

$($a$)$

z $=5\mathrm{.}00$ cm

$277\mathrm{.}15$ MN$/$C

$($b$)$

z $=10\mathrm{.}0$ cm

$216\mathrm{.}72$ MN$/$C

$($c$)$

z $=50\mathrm{.}0$ cm

$36\mathrm{.}39$ MN$/$C

$($d$)$

z $=200$ cm