Match each set builder expression with the correct interval by selecting a letter from each drop down selector.

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  1. (,b]\displaystyle {\left(-\infty,{b}\right]}
  2. [a,b]\displaystyle {\left[{a},{b}\right]}
  3. [a,)\displaystyle {\left[{a},\infty\right)}
  4. [a,b)\displaystyle {\left[{a},{b}\right)}
  5. (,)\displaystyle {\left(-\infty,\infty\right)}
  6. (a,b)\displaystyle {\left({a},{b}\right)}
  7. (a,)\displaystyle {\left({a},\infty\right)}
  8. (a,b]\displaystyle {\left({a},{b}\right]}
  9. (,b)\displaystyle {\left(-\infty,{b}\right)}