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→Scenario 4: Add section to professor's subject.
'''Postconditions:''' Manage professors page.
'''Comments:'''<br />
* section id (sc_id) cannot be entered separately from course id (c_id), since the professor table use a 4-part primary key (bu_id, c_id, sc_id, sc_semesterid)
=='''Scenario 5:''' Delete professor's.==