Given the following three points of $4$ dimensions, calculate

their centroid: p$1[20,20,30,5],$ p$2[20,30,20,8]$ and p$3[20,10,10,11].$

On notation: remember the points are stored in lists in our

cluster code; so instead of the $($x$,$y$,$z$),$ we are using $[$w$,$x$,$y$,$z$]$

but they are still considered points.