Lizzie Paulk, CPA, is an assistant to the controller of Insignia Co. In her spare time, Lizzie also prepares tax returns and performs general accounting services for clients. Frequently, Lizzie performs these services after her normal working hours, using Insignia Co.'s computers and laser printers. Occasionally, Lizzie's clients will call her at the office during regular working hours.

Discuss whether Lizzie is performing in a professional manner.