The following question is about software design subject. The title given is Face Recognition Attendance System. In this system, after the attendance of the students is taken by scanning their faces, the lecturer is able to get the report of the students' attendance in which the system will generate the report and provide to the lecturer. In order for the system to generate the report, the lecturer should enter the required month for the report, enter the course code and the group that the lecturer teaches. Below is the method for this situation.

generateReport(courseCode: String, group: int, month: String)

The above method is categorized as non-algorithmic in operation specification. Please provide Pre-/Post condition pair for this method.