Comparing to the file-based approach, the database approach has multiple advantages. Choose two advantages of the database approach. (1 point) Data redundancy control Cost of conversion Duplication of data Separation of data Data consistency Choose one most inappropriate explanation on ANSI-SPARC Three-Level Architecture. (1 point) It provides user's views where each user can have different view of data. Internal level is a physical representation of the database. How the data is stored is described at the internal level. O Data is dependent between different levels (e.g., user's view reflects changes addition/removal of attributes at the conceptual level). At the conceptual level, it describes what data is stored in database. In database system development lifecycle, database is designed based on requirement information collected from the organization staff members. To communicate with them, DB designers/developers use a conceptual model of data such as network and hierarchical modeling, but entity-relationship (ER) data modeling is most popular one at the first step of the DB design. Choose two most inappropriate descriptions about ER data modeling. (1 point) Ternary relationships must always be divided into binary relationships. ER modeling is non-technical, intuitive, easy to explain database structures to DB users. Basic four components of ER modeling are entity, relationship, attribute, and constraints. One entity cannot have a relationship alone. In ER modeling, database is described as a collection of entities and relationships of data