Paper has a dielectric constant K=3.7 and a dielectric strength of 15*10^6 V/m. Suppose that a typical sheet of paper has a thickness of .11mm. You make a "homemade" capacitor by placing a sheet of 21*14 cm paper between two aluminum foil sheets of the same size.
(a) What is the capacitance C of your device?
(b) About how much charge could you store on your capacitor before it would break down?