$3.$ Network Number:$18\mathrm{.}0\mathrm{.}0\mathrm{.}0$Required:$129$ subnetsWhat default class is this address? A$,$ B$,$ or C$?$ What is the default subnet mask? How many bits did you borrow? What is the new subnet mask for this host AFTER the bits are borrowed? How many subnets were created? How many actual hosts per subnet?$($Use a calculator for this one.$)$ How many usable hosts per subnet? Is the address $18\mathrm{.}61\mathrm{.}127\mathrm{.}128$a Network, Host or Broadcast address? Is the address $18\mathrm{.}238\mathrm{.}0\mathrm{.}0$a Network, Host or Broadcast address? Is the address $18\mathrm{.}118\mathrm{.}0\mathrm{.}0$a Network, Host or Broadcast address? Is the address $18\mathrm{.}224\mathrm{.}128\mathrm{.}0$a Network, Host or Broadcast address?