Assume that you are trying to build an operation interface which allows the mechanical engineering students in UNT
to register for any MEEN 3000 level classes (which are highlighted in blue as shown in 2019-2020 MEE curriculum
flowchart).
In order to register for a MEEN class, students need to meet all the prerequisites as well as co-requisites. Once he/she
fulfilled all the conditions for a certain class, that class can be registered successfully. Otherwise the system will object
his request and give that student a reminder why he/she could not register for that class.
