$2$ What is the prefix length notation for the subnet mask $255\mathrm{.}255\mathrm{.}255\mathrm{.}224?$

$125$

$128$

$126$

$1272$ What is the prefix length notation for the subnet mask $255\mathrm{.}255\mathrm{.}255\mathrm{.}224?$

$125$

$128$

$126$

$127$