There are $124$ Subnets and $1950$ hosts per subnet.

$[$IP addresses for different classes, C: $192\mathrm{.}168\mathrm{.}10\mathrm{.}0,$ Class B: $172\mathrm{.}16\mathrm{.}0\mathrm{.}0,$ Class A: $10\mathrm{.}0\mathrm{.}0\mathrm{.}0]$

i$)$ Which class of IP will be used?

ii$)$ What will be the prefix?

iii$)$ What will be the network ip address of $109$th Subnet?

iv$)$ What will be the ip address of $1680$th host of $109$th Subnet?