Four people are using computers in the computing laboratory. You know that first person is the student and second isn't, but you don't know whether they're using the software on the network. You know that the third person is using the software on the network and the fourth is not, but you do not know whether they are students.
As the laboratory supervisor, you are required to enforce the rule that only students are allowed to use the software on the network. Which two people should you question, and what should you ask them?