Question 4(Marks: 25) Unified Modelling Language (UML) is often used as notation when drawing Entity Relationship Diagrams (ERDs) since it is a notation that software developers are already familiar with. Q.4.1 What is the difference between a binary relationship and a unary relationship? Provide an example of each as part of your answer. (5)Q.4.2 Draw an Entity Relationship Diagram (ERD) using Unified Modelling Language (UML) notation according to the below business rules. Your design should be at the logical level - include primary and foreign key fields and remember to remove any manytomany relationships.Tip: Pay attention to the mark allocation shown below.Movie metadata - business rules: A website about the film industry wants to store data about movies. A movie contains several scenes (at least one), and a scene will never be used in more than one movie.