The figure shows two nonconducting spherical shells fixed in place

The figure shows two nonconducting spherical shells fixed in place

The figure shows two nonconducting spherical shells fixed in place. Shell 1 has uniform surface charge density +6.0 microC/m^2 on its outer surface and radius 3.0 cm; shell 2 has uniform surface charge density +4.0 microC/m^2 on its outer surface and radius 2.0 cm; the shell centers are separated by L = 10 cm. In unit-vector notation, what is the net electric field at x = 2.0 cm?