Answer the following questions using your own words: - What is the relationship (similarities and differences) between theta join, equal join and natural join? - Given the following two relations: Manager (name, position, salary) Employee (name, age, dob, salary) Present an example query in Relational Algebra respectively that represents the theta join, equal join and natural join between the Manager and Employee relations. For the theta join, please use a comparison connector other than the " = " sign (in other words, you can use other signs such as ,=, etc in the join predicate). Please submit a Word (.doc or docx format) or PDF document containing your answers to this question in maximum one (1) page