Given the IP address $139\mathrm{.}249\mathrm{.}214\mathrm{.}191$ and the subnet mask of $255\mathrm{.}255\mathrm{.}240\mathrm{.}0.$

a$.$ What is the network number?

$($Decimal Number$)$

b$.$ What is the subnet numbe $($Decimal Number$)$

c$.$ What is the host number?

$($Decimal Number$)$