Complete the function compress$\_$matrix that takes a $2$D array as a parameter and

return a new compressed $2$D array. In the given array the number of row and column will

always be even. Compressing a matrix means grouping elements in $22$ blocks and

sums the elements within each block. Check the sample input output for further

clarification.

Hint: Generally the block consists of the $(i,j),(i+1,j),(i,j+1)$ and $(i+1,j+1)$ elements

for $22$ blocks.

You cannot use any built$-$in function except len$()$ and range$().$ You can use the $np$

variable to create an array.