Two particles with the same mass of 11 kg 11 kg are involved in a completely inelastic head‑on collision. Before the collision, both particles have the same speed of 2 m / s . 2 m/s. Which statement describes the velocities of the particles after the collision?

One of the particles continues at 3 m/s, and the other reverses direction and moves at 6 m/s.
Each particle's speed is still 3 m/s, but each has reversed its direction.
There is not enough information to determine the velocities after the collision.
One of the particles continues to move at 3 m/s, while the other particle is at rest.
Both particles have zero velocity.