problems-criminal law and procedure

1. Can you think of an example of an ex post facto law? 3. Can a municipality enforce an ordinance totally banning religious organizations from canvassing neighborhoods in search of new members? What about an ordinance that prohibits such canvassing between the hours of 8 P.M. and 8 A.M.? 8. How does the doctrine of judicial review affect the power of a state legislature to define criminal conduct? Would the constitutional limitations on legislative power be effective without the power of courts to declare laws unconstitutional?