((a)) Any person subject to this chapter who, with an intent to kill or inflict great bodily harm, unlawfully kills a human being in the heat of sudden passion caused by adequate provocation is guilty of voluntary manslaughter and shall be punished as a court-martial may direct.

((b)) Any person subject to this chapter who, without an intent to kill or inflict great bodily harm, unlawfully kills a human being—

((1)) by culpable negligence; or

((2)) while perpetrating or attempting to perpetrate an offense, other than those named in clause (4) of (article 118), directly affecting the person;