Two very large, nonconducting plastic sheets, each 10.0 cm thick, carry uniform charge densities $\sigma_1$, $\sigma_2$, $\sigma_3$ and $\sigma_4$ on their surfaces, as shown in the following figure. These surface charge densities have the values $\sigma_1 = -7.10 \, \mu C/m^2$, $\sigma_2 = 5.00 \, \mu C/m^2$, $\sigma_3 = 2.00 \, \mu C/m^2$, and $\sigma_4 = 4.00 \, \mu C/m^2$. Use Gauss's law to find the magnitude and direction of the electric field at the following points, far from the edges of these sheets.
What is the magnitude of the electric field at point B, 1.25 cm from the inner surface of the right-hand sheet?
Express your answer to three significant figures and include the appropriate units.
What is the magnitude of the electric field at point C, in the middle of the right-hand sheet?
Express your answer to three significant figures and include the appropriate units.
