$\displaystyle \left[ \frac{9}{2}, \frac{11}{2} \right]$\displaystyle \left[ \frac{9}{2}, \frac{11}{2} \right]

$\displaystyle \left( \frac{11}{2}, \frac{13}{2} \right)$\displaystyle \left( \frac{11}{2}, \frac{13}{2} \right)

$\displaystyle \left( \frac{13}{2}, \frac{19}{2}\right]$\displaystyle \left( \frac{13}{2}, \frac{19}{2}\right]

$\displaystyle \left( \frac{19}{2}, \frac{37}{2}\right]$\displaystyle \left( \frac{19}{2}, \frac{37}{2}\right]