How has the jury been instructed on the theory of aiding and abetting in the commission of a crime?

[127 Cal.App.3d 993] The jury was also instructed on a theory of aiding and abetting in the commission of a crime (CALJIC Nos. 3.00, 3.01) and that mere presence at the scene of the commission of the offense and failure to take steps to prevent a crime do not establish aiding and abetting. (People v. Hill (1946) 77 Cal.App.2d 287, 294, 175 P.2d 45.)