min / max system expression help

i want to calculate the lowest and highest x and y position of a bunch of sprites, the objects from where i want the calculation would be selected by mouse, so the amount of sprites is depending on the selection

how would i write this?

do i need an array to do this? if so how would i implement this?

my endgoal is to find out the center of the selected sprites

so i think if i know the above i could calculate the distances and divide by 2 to get the middle point.

Why you need to find the center of the sprite? What are you doing with the hotspot?

the idea is to pin the selected objects to a move/rotate sprite in the middle point of the selection

Take a look here: Physics objects drag and drop with using pivots

thanx but its not what im looking for, i want to find out the middlepoint between multiple selected sprites, essentially i want to create a bounding box from multiple sprites