By hand (pencil and paper) write what will be displayed if the following commands are executed by

Question:

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. (Parts (b), (c), (d), and (e) use the vector that was defmed in part (a).)
(a) a = 1: 4 :17
(b) b = [a (1 : 3) a]
(c) c = [a; a;]'
(d) d = [a' a']'
(e) e = [[a; a; a; a; a] a']