What is the speed of the ions as they exit Region II?
1.13×105 m s−11.13 \times 10^5\text{ m s}^{-1}1.13×105 m s−1
2.25×105 m s−12.25 \times 10^5\text{ m s}^{-1}2.25×105 m s−1
4.50×105 m s−14.50 \times 10^5\text{ m s}^{-1}4.50×105 m s−1
9.00×105 m s−19.00 \times 10^5\text{ m s}^{-1}9.00×105 m s−1