a$)$ Illustrate three points with sound logic, from a Business Justification and Project

Management point of view $$ when should you be using OOP languages as

opposed to Structured languages for a software development project.

$($b$)$ Why Ethics is important in Computing and what sort of protections Patents usually

provide

$($c$)$ How Primary Keys and Foreign Keys relate multiple tables in a RDMS Database?

Provide relevant example.