numbers $=\{2132728595483358\}$

Partition$($numbers$,1,7)$ is called.

Assume quicksort always chooses the element at the midpoint as the pivot.What is the pivot?

Ex: $9$

What is the low partition?$\{$

Ex: $123$

$\}$What is the high partition?$\{$

$\}$What is numbers after Partition$($numbers$,1,7)$ completes?$\{$

$\}$