According to the kinetic-molecular theory of gases, the average kinetic energy of the argon atoms is _______ the average kinetic energy of the krypton atoms, and the average speed of the argon atoms is _______ the average speed of the krypton atoms.
1) less than, the same speed
2) equal to, faster than
3) greater than, faster than
4) equal to, the same speed as
5) less than, slower than