Two very large, nonconducting plastic sheets, each $10\mathrm{.}0$ cm thick, carry uniform charge densities $1,$ $2,$ $3,$ and $4$ on their surfaces as shown in the figure above. These surface charge densities have the values $1=+4\mathrm{.}00$C$/$m$2,$ $2=+2\mathrm{.}00$C$/$m$2,$ $3=-4\mathrm{.}00$C$/$m$2,$ and $4=+6\mathrm{.}00$C$/$m$2.$ Use Gauss's law to find the magnitude of the electric field at point A$,5\mathrm{.}00$ cm from the center of the left face of the left$-$hand sheet.