Current Attempt in Progress

You have two plates of copper, a sheet of mica $($thickness $=0\mathrm{.}33mm,k=5\mathrm{.}4),$ a sheet of glass $($thickness $=2\mathrm{.}0mm,k=7\mathrm{.}0),$ and a slab of paraffin $($thickness $=1\mathrm{.}9cm,k=2\mathrm{.}0).$ To make a parallel$-$plate capacitor with the largest $C,$ which sheet should you place between the copper plates: mica, glass or paraffin?