$($i$)$ State three reasons for subnetting an IP network.

$($ii$)$ A network IP address is $192\mathrm{.}168,10\mathrm{.}0/224.$ Determine the

$($I$)$ subnet mask;

$($II$)$ number of subnets possible;

$($III$)$ first three host addresses in the first subnec.

$($IV$)$ broadcast address for the first subnet.