Use ONLY the Domain Names and IPs in the following table to answer the questions. You may always use TTL to represent the value to be included in a RR (Resource Record).

	Domain Name	IP
root DNS server	root.dns.net	A1.B1.C1.D1
TLD DNS server for the .edu domain	tldX.dns.edu	A2.B2.C2.D2
TLD DNS server for the .com domain	tldA.dns.com	A3.B3.C3.D3
Authoritative DNS server in the .msudenver.edu domain	primary.dns.msudenver.edu	A4.B4.C4.D4
Authoritative DNS server in the .google.com domain	primary.dns.google.com	A5.B5.C5.D5
Local DNS server in the .msudenver.edu domain	localPri.dns.msudenver.edu	A6.B6.C6.D6
Local DNS server in the .google.com domain	localPri.dns.google.com	A7.B7.C7.D7
Web server in the .msudenver.edu domain	www.msudenver.edu	A8.B8.C8.D8
Web server in the .google.com domain	www.google.com	A9.B9.C9.D9

(a) Write all the RRs (Resource Records) possibly stored in the DNS database on the root DNS server.

(b) Write all the RRs possibly stored in the DNS database on the TLD DNS server for the .edu domain

Write all the RRs possibly stored in the DNS database on the authoritative DNS server for the .msudenver.edu domain

Write all the RRs possibly cached on the local DNS server for the .msudenver.edu domain assuming that it does NOT cache any TLD or authoritative DNS servers information. (hint: the information on the root DNS server is in the system configuration instead of in the cache).