numbers $=[18,17,19,46,37,50,56,35,63,68]$

Partition$($numbers$,3,9)$ is called. So$,$ only elements in indices $3$ to $9$ are partitioned. Elements in indices $0$ to $2$ are not affected.

Assume quicksort always chooses the element at the midpoint as the pivot. What is the pivot? What is the low partition? What is the high partition? What is numbers after Partition$($numbers$,3,9)$ completes?