Rearranging Elements in a Matrix Help

So my mentor has given me the task of rearranging a matrix. She wants me to change it form this:

 [7 1 5
 8 3 10
 4 9 12
 2 6 11]

to this:

 [1 2 3
 4 5 6
 7 8 9
 10 11 12]

Thanks (Also don't just put the script in please explain how it works.

[Azzi Abdelmalek]

What have you tried?

Answer 1

[Azzi Abdelmalek]

Use a sort function and reshape function

[Ronald]

I APPRECIATE IT. JUST STARTED YESTERDAY SO THIS IS A LITTLE OVER MY HEAD.

Edit: It was discreet so it forced me to read what the functions do. Great Answer!