Consider the following E/R diagram with isa relationships, in which every node represents an entity set. If we follow an object- oriented approach and convert this hierarchy into relations/classes,...

This is a Database course. Please explain how you get the answer and if there is a formula for such kinds of questions.

I would love to understand how that question is answered as I have an exam tomorrow.

I got 4 as an answer but 4 is not the answer.

Thank you in advance.

Extracted text: Consider the following E/R diagram with isa relationships, in which every node represents an entity set. If we follow an object- oriented approach and convert this hierarchy into relations/classes, the number of relations generated will be Isa Isa Isa Answer: 4