A company has 1250 employees and the employees have been trained to handle 4 job duties: Clerks: 1200 of the employees have been approved to work as clerks. To do their job, a clerk needs a total of 10 different permissions. Tellers: 100 of the employees have been approved to work as tellers. To their job, a teller needs a total of 9 different permissions. Managers: 10 employees have been approved to work as managers. To do their job, a manager needs a total of 6 different permissions. Auditors: 2 employees have been approved to work as auditors. To do their job, an auditor needs a total of 4 different permissions. If a role based access control (RBAC) system is used, how many relationships between users and permissions must be defined