Which preventive, detective and or corrective controls would best mitigate the following threats

1 A salesperson successfuly logged into the payroll system by guessing the payrolls supervisor's password

2 An employee received an email purposting to be from her boss informing her of an important new attendance policy. When she clicked on a link embedded in the email to view the new policy, she infected her laptop with a keystroke logger

3 A company purchased the leading ''off the shelf'' e commerce software for linking its electronic storefront to its inventory database. A customer discovered a way to directly access the bank end database by entering appropraite SQL code

4 An employee picked up a USB drive in the parking lot and plugged it into his laptop to ''see what was on it''. As a result a keystroke logger was intslalled on that laptop

5 To facilitate working from home, an employee installed a modem on his office workstation. An attacker succesfully penetrated the company's system by dialling into that modem