Shuffling works this way: Divide the image into $16$ equally sized image blocks and give each block a number $($from

$1$ to $16).$ Then pick a pair of image blocks and swap it$$s R$,$ G and B values. Here, we use pairs of image blocks as

follows: $(1,16),(2,15),(3,14),$ and so on$.$ Repeat choosing and swapping process until all image blocks are swapped.

You need to define and implement the following function to do this DIP