Find the critical points.

$y(x)=x(x-9{)}^7$

$($Use symbolic notation and fractions where needed. Give you answer as a coema$-$separated list.$)$

$c=$

Defermine if the fusction is increasing or decreasing on the interval $(c_{\text{m}\text{a}\text{x}}-c_{\text{m}\text{a}\text{x}}).$

$$ increasing