(a) A person commits the crime of assault in the first degree if

1. (1) that person recklessly causes serious physical injury to another by means of a dangerous instrument;
2. (2) with intent to cause serious physical injury to another, the person causes serious physical injury to any person;
3. (3) the person knowingly engages in conduct that results in serious physical injury to another under circumstances manifesting extreme indifference to the value of human life;
4. (4) that person recklessly causes serious physical injury to another by repeated assaults using a dangerous instrument, even if each assault individually does not cause serious physical injury; or
5. (5) that person knowingly causes another to become unconscious by means of a dangerous instrument; in this paragraph, “dangerous instrument” has the meaning given in AS 11.81.900(b)(16)(B) .