(a) Purposely or negligently fails to perform any mandatory duty as required by law or by a court of competent jurisdiction;

(b) Knowingly performs an act in his or her official capacity which he or she knows is forbidden by law;

(c) With the purpose to obtain advantage for himself or herself or another, performs an act in excess of his or her lawful authority;

(d) Solicits or knowingly accepts for the performance of any act a fee or reward which he or she knows is not authorized by law.