A ball with mass $0.5\,\text{kg}$ is hurled at a wall at a speed of $12\,\text{m s}^{-1}$. After rebounding, it moves back at $8\,\text{m s}^{-1}$. The contact time is $0.10\,\text{s}$. Determine the average force on the ball caused by the collision.
- A$0.2\,\text{N}$
- B$1\,\text{N}$
- C$20\,\text{N}$
- D$100\,\text{N}$