Chemical Solutions and Colligative Properties

Which of the following statements are correct?

1. Non-volatile solutes decrease the boiling point of a solvent.
2. A non-volatile solute lowers the freezing point of a solvent.
3. 1 M sugar and 1 M urea aqueous solutions have the same effect on colligative properties.
4. Osmosis is the movement of solvent through a permeable membrane from dilute to more concentrated solution.