Write a firewall rulebase for the router with IP address $127\mathrm{.}71\mathrm{.}0\mathrm{.}1$ that fulfills the following security assuming that the network contain machines with IP addresses $127\mathrm{.}71\mathrm{.}0\mathrm{.}2-255$: $(7$ points$)$

$($a$).$ Allow anyone to access a web server called CSE

$($b$).$ All internal users to access their mailbox via POP$3$ on the server called CSEmailer

$($c$).$ Block mails from the site SPIGOT that is known to host spammers

$($d$).$ Allow intemal users to access any web sites except the one with IP addresses in the range from $192\mathrm{.}124\mathrm{.}34\mathrm{.}0$ to $192\mathrm{.}124\mathrm{.}34\mathrm{.}255.$

$($e$).$ Stealth and clean up rules.