$1.$ You have sub$-$netted your class C network $192\mathrm{.}168\mathrm{.}1\mathrm{.}0$ with a subnet mask of $255\mathrm{.}255\mathrm{.}255\mathrm{.}240.$ Please list the following: number of networks, number of hosts per network, the full range of the first three networks, and the usable address range from those first three networks.

$2.$ What is the broadcast address on the network $192\mathrm{.}168\mathrm{.}95\mathrm{.}128/23.$

$3.$ Enter the maximum number of valid subnets and usable hosts per subnet that you can get from the network $172\mathrm{.}21\mathrm{.}0\mathrm{.}0255\mathrm{.}255\mathrm{.}254\mathrm{.}0$

$4.$ What is the Subnet Mask corresponding to a shorthand of $/10.$