Figure 23-55 shows, in cross section, three infinitely large nonconducting sheets on which charge is...

Figure 23-55 shows, in cross section, three infinitely large nonconducting sheets on which charge is uniformly spread. The surface charge densities are σ₁ = +2.00 µC/m², σ₂ = +4.00 µC/m², and σ₃ = -5.00 µC/m², and distance L =1.50 cm. In unit-vector notation, what is the net electric field at point P?