- $ D = \\\left( {\\\frac{5}{2};9} \\\right]$.
- $ D = \\\left( {\\\frac{5}{2};9} \\\right)$.
- $ D = \\\left[ {\\\frac{5}{2};9} \\\right)$.
- $ D = \\\left[ {\\\frac{5}{2};9} \\\right]$.