So I am not sure if this is the result of a recent edit, or has always been this way. I cannot find anyony else point it out, so i lean towards the former.
Task 5.3 explicitly states, as the last bullet point, "Do not use any access-lists to accomplish this"
The solution guide uses the "ip multicast boundary" command which references an ACL. The SG even calls out that restriction in its explanation, yet violats it. "The multicast filtering must be done without using any access-lists."
I am thinking maybe the restriction is supposed to be something like "You may not apply an ACL to the interface to accmplish this" or "you may not use the 'ip access-group' command to accomplish this"
I was stumped on this one because I could not figure out for the life of my how to classify a single multicast address without using any kind of ACL.