How do you see everyone on a schoology conference

An endless cycle of creation and response on the internet is called

Anetwork security application that prevents access between a private and trusted network and other untrusted networks

Description: write function lastfirst() that takes one argument—a list of strings of the format "lastname, firstname" —and returns a list consisting of two lists: (a) a list of all the last names (b) a list of all the first names