- $ \\\left( {\\\frac{3}{7};\\\frac{1}{2}} \\\right).$
- $ \\\left( {0;\\\frac{1}{3}} \\\right).$
- $ \\\left( {\\\frac{1}{3};\\\frac{2}{5}} \\\right).$
- $ \\\left( {\\\frac{2}{5};\\\frac{3}{7}} \\\right).$