$3\mathrm{.}8\mathrm{.}1$: Quicksort.

$x3$ zqy $7$

Jump to level $1$

numbers $=(28,29,46,47,64,77,75,85,93)$

Partition$($numbers$,0,4)$ is called.

Assume quicksort always chooses the element at the midpoint as the pivot.

What is the pivot?

What is the low partition?

$($comma between values$)$

What is the high partition?

What is numbers after Partition$($numbers$,0,4)$ completes? $($