a) Read the following scenario; Imagine it's the first day of class in college, and you sit down for the first lecture. Your professor walks in and makes an announcement: 'Welcome back after the summer everyone. I have to start off with some bad news. Due to a glitch in the university's database, all grades and credits from last semester have been lost. I'm sorry, but we are going to have to do last semester all over again. Now open your book on page...' That would be disastrous, right? Could you imagine? How could the university lose all that information? Luckily, these things almost never happen. Based on the scenario, answer the following questions: 1. Identify the person who keeps the data above secure. Justify your answer. (3 marks) 2. Explain THREE (3) examples of potential database threats to the database. (6 marks) 3. Explain THREE (3) countermeasures for your answer in question 2. (6 marks) b) "DBA is one of the biggest potential of insider threat". Do you agree? Justify and discuss your answer. (5 marks) c) Distinguish FIVE (5) roles between Database Administrator (DBA) and Data Administrator (DA)