(a) A person commits aggravated robbery if he or she commits robbery as defined in § 5-12-102, and the person:
(1) Is armed with a deadly weapon;
(2) Represents by word or conduct that he or she is armed with a deadly weapon; or
(3) Inflicts or attempts to inflict death or serious physical injury upon another person.
(b) Aggravated robbery is a Class Y felony.