Answer: Unprofessional
Explanation:
Unprofessional behavior is defined as the behavior in which ethics and principles are missing in any employee or worker .This behavior disrupts work-environment,improper habit, carrying personal work to professional area, dishonorable principle,non-attentiveness, etc.
According to the question, Robert is displaying unprofessional behavior because he is late for office many times and no preparation before appointment along with aggressive mood.
