A. 1 b E LT Heading 1 T Heading 2 T Heading 3 T Heading 4-Thea . - Paragraph Short Answer Revision Exercise Write down answers to the following questions: Question 1 (3 marks) Briefly describe the differences between the candidate keys and the primary keys of a table. (1.0 marks) Give xamples to illustrate your answer. (2 marks) Question 2 (3 marks) Explain what is meant by a foreign key. (1 mark) How do foreign keys of tables relate to primary keys? (1 mark) Give examples to illustrate your answer. (1 mark) Question 3 (3 marks) Explain the function of each of at least three of the clauses in the SELECT statement (2.5 marks). What restrictions are imposed on these clauses (0.5 marks)