[Not graded] Let $\displaystyle {f{{\left({x}\right)}}}=\sqrt{{{6}-{x}}}$ and $\displaystyle {g{{\left({x}\right)}}}={x}^{{2}}-{x}$.
Then the domain of $\displaystyle {f}\circ{g}$ is equal to $\displaystyle {\left[{a},{b}\right]}$ for
$\displaystyle {a}=$ Preview Question 6 Part 1 of 2  
and
$\displaystyle {b}=$ Preview Question 6 Part 2 of 2