The following matrix is defined in MATLAB: By hand (pencil and paper) write what will be displayed

Question:

The following matrix is defined in MATLAB:

By hand (pencil and paper) write what will be displayed if the following commands are executed by MATLAB. Check your answers by executing the commands with MATLAB.
a) A = M( [1, 13], [1, 5, 6])
c) C = M ( [1, 2], :)
b) B = M(: , [4, 4:6])
d) D = M ( [2, 3], [2, 3])