With reference to the evolution of landforms, consider the following statements:

1. Endogenic forces are those internal forces which derive their strength from the earth’s interior and play a crucial role in shaping the earth crust.
2. Exogenic forces are those forces which derive their strength from the earth’s exterior or originate within the earth’s atmosphere.
3. Mountain building forces, continent building forces, earthquakes, volcanism etc are good examples of exogenic forces.

Which of the statements given above is/are correct?