Least value

11. If $b$ is greater than 3, then, of the following which will always have the LEAST value?

1. $\frac{3}{b-1}$
2. $\frac{3}{b}$
3. $\frac{3}{b+1}$
4. $\frac{b}{3}$
5. $\frac{b+1}{3}$