Could you help me with this. Thank you.

Homework 8: Email, DNS and NAT ISP Mail Host A E Server R with NAT Home Local ISP ISP DNS Host B Server EO-E900-17-BB-4B 1A 23-F User on Host Asends email to the local ISP mail server using a mail user agent with SMTP enabled. First, the email program needs to know the hostname and IPaddress of the user's mail Server. a) Describe how the email program can use DNS resource records to determine the hostname and IP address of the mail server to sendthe email to