9. (5 pts) If A is an array of size NXM (where N and M are not given, but now we know that they are larger than 4), write one line of MATLAB code to replace the upper left portion of A of size 2 x 2 with the lower right portion of A of size 2x 2. 10.(5 pts) If A is an array of size NXM (where N and M are not given, but now we know that they are larger than 4), write MATLAB code to swap the upper left portion of A of size 2 x 2 with the lower right portion of A of size 2 x 2. This time you may use more than one line of code (but it should be no more than 3 lines)