(2) A person remains culpable as an assistant if he:

     a) encourages the commission of an offence, or reinforces the decision to commit an offence, or promises that he will assist after the commission of an act.
     b) provides counsel as to how an offence is to be committed, or provides the means used for the commission of the offence.
     c) facilitate the execution of an offence by providing assistance before or after the commission of the offence.