This question involves database systems:

Answer the following questions: a) What category does the above specialization belong to? Choose from below options: 1.Disjoint,total2.Disjoint,partial3.Overlapping,total4.Overlapping,partial b) How would the diagram change if this mini-world required everyone to be a student, administrator or instructor? c) How would the diagram change if in this mini-world, no student was allowed to be an instruct or an administrator