The first task is asking to configure the firewall so that no one could ping it but allow the firewall to ping anyone.
The solution for the outside interface is "icmp permit any echo-reply outside". This was confusing because wouldn't that permit anyone to ping the interface? I found this article here https://supportforums.cisco.com/thread/223769 that says you should DENY the echo-reply and this article http://www.cisco.com/en/US/docs/security/asa/asa72/command/reference/i1_72.html#wp1631466 that states that icmp permit echo-reply would permit anything to ping the interface.
Am I missing something?