Bank had a substantial increase in the number of robberies at its main office. Bank hired Snipe, an expert rifleman, and placed him at a position where he could observe the entire floor of the bank through an opening in the ceiling of the bank. Snipe was instructed to shoot if he believed that it was necessary to prevent a robbery. What was the purpose of hiring Snipe?
1) To increase security measures
2) To provide surveillance
3) To prevent robberies
4) To shoot at robbers