Existing law defines an assault as an unlawful attempt, coupled with present ability, to commit a violent injury upon the person of another. Existing law defines a battery as any willful and unlawful use of force or violence upon the person of another. Under existing law, an assault or battery committed against specified professionals engaged in the performance of their duties, including peace officers, firefighters, and emergency medical personnel, is punishable by imprisonment in a county jail not exceeding one year, by a fine not exceeding $2,000, or by both that fine and imprisonment.