Designing a Rule Base, computer science homework help

In
this activity, you will configure a set of basic rules for packet
filtering for a network with the following characteristics: The internal
network is represented by 192.168.120.0; the firewall is hosted at
192.168.120.1; the e-mail server is at 192.168.120.2; the Web server is
at 192.168.120.3; and the DNS server is at 192.168.120.4. This 6-5
activity can also be found on pages 228-229 of your text.

1. Create a rule that allows internal hosts to access the external network.
2. Create a rule that prevents any access to the firewall.
3. Create a rule that allows internal and external access to the e-mail server and Web server.
4. Create a rule that allows internal access to the DNS server.
5. Answer the following question: what rule involving the firewall could you add?

In MS Word, list the rules (1-4) that you have created and include your answer from #5.