Two very large parallel sheets are $5\mathrm{.}00$ cmcm apart. Sheet AA carries a uniform surface charge density of $-8\mathrm{.}30$ C$/$m$2$C$/$m$2,$ and sheet BB$,$ which is to the right of AA$,$ carries a uniform charge density of $-12\mathrm{.}1$ C$/$m$2$C$/$m$2.$ Assume that the sheets are large enough to be treated as infinite.