(1)  Where a crime is committed, each of the following persons is deemed to be a party to, and to be guilty of, the crime, and may be charged with actually committing it:

(a) every person who actually commits the crime;

(b) every person who does any act or makes any omission for the purpose of enabling or aiding another person to commit the crime;

(c) every person who abets another person in committing the crime;

(d) every person who instigates any other person to commit the crime.

(2)  Any person who instigates another to do any act or make any omission of such a nature that, if he had himself done the act or made the omission, the act or omission would have constituted a crime on his part, is guilty of the same crime as if he had himself done the act or made the omission; and may be charged with himself committing that crime.