Sec. 5. (a) Police officers have the following powers, privileges, immunities, and duties:
(1) General police powers including the power to arrest, without process, all persons who commit an offense within the view of the officer.
(2) The same common law and statutory powers, privileges, and immunities as sheriffs and constables, except that the officers are empowered to serve civil process only to the extent authorized by the employing board of trustees.
(3) The duty to enforce and to assist the officials of the state educational institutions at which the officers are employed in the enforcement of the rules and regulations of the state educational institution.
(4) The duty to assist and cooperate with other law enforcement agencies and officers.
(b) The board of trustees employing a police officer may expressly prohibit a police officer from exercising any of the powers otherwise granted by law.