The University of Rome 3 was recently a victim of an SQL injection (SQLi) attack, one the most popular and oldest hacking techniques, which exploits a security vulnerability in the database layer of an application. a) Describe SQLi attack types that require actual transfer of data, and highlight the main difference among them. [10 marks] b) Could code analysis be used to protect against such attacks? Justify your answer. [10 marks] c) Consider the following SQL statement: SELECT name, email FROM users WHERE id=5; IF SYSTEM_USER=' Sa' SELECT 1/0 i. What is the statement trying to do within the database? Consider that sa stands for system administrator. [15 marks] ii. How can the system administrator protect against such a threat? [15 marks]