Image processing relies on multi$-$dimensional arrays. Write a method selectRect that simulates selecting and returning a rectangular area of a $2$D image.

$//$ Returns a full $2$d int array with data from the rectangular area

$//$ specified by startRow, startCol, endRow, and endCol $($assume

$//$ startRow$<=$endRow and startCol$<=$endCol$)$ if those four indexes are

$//$ valid.

$//$ Return null if image is null or has zero rows or zero cols.

$//$ Also return null if any row$/$col index is invalid.

public static int$[][]$ selectRect$($int$[][]$ image,

int startRow, int startCol,

int endRow, int endCol$)\{$

$//$ ADD code

$\}$