question 1 (10 points): define the type of security attack in each of the following cases: a) a student paid sar 100 online to buy a book but later he finds that he has been charged sar 1000 (in spite of sar 100). b) an employee sends millions of emails per day to another employee using an automated emailing system. c) an employee breaks into another employee’s personal account to know about his financial status. d) an employee has threatened another employee through email but later on he is denying.