INF2603 Semester 1 Assignment 02 2019 Question 1: a. What does it mean to say that a database displays both entity integrity and referential integrity? (2) b. What is a strong (or identifying) relationship and how is it depicted in a Crow’s Foot ERD? (2) c. What is an entity cluster and what advantages are derived from its use? (3) d. What is a surrogate primary key and when would you use one? (3) e. When implementing a 1:1 relationship, where should you place the foreign key if one si...