Two $1\mathrm{.}70$ cm $1\mathrm{.}70$ cm plates that form a parallel$-$plate capacitor are charged to $0\mathrm{.}713$ nC$.$ What is the potential difference across the capacitor if the spacing between the plates is $1\mathrm{.}30$ mm$?$ What is the potential difference across the capacitor if the spacing between the plates is $2\mathrm{.}60$ mm$?$