Solving a problem in physics section 44 paragraph 92 el

92. The space between the plates of a plane capacitor filled glass (ε = 7). When the capacitor was coupled to a voltage source, the pressure on the glass plate was found to be 1 Pa. To determine: 1) the surface charge density on the plates of the capacitor; 2) electrostatic offset; 3) the intensity of the electrostatic field in the glass; 4) The surface density of the bound charges on the glass; 5) the bulk density of the electrostatic field energy in the glass.