October 20, 2017Math 307Name:Page 2 out of 10Problem 1.  Short Answer.The questions (a)-(h) below are worth 3 marks each and requirea short explanation (unless otherwise stated).(a) Specify the size and value of the variablezthat you would obtain by typing the following inMATLAB:>> x=3:-1:1; % this produces a row vector>> y=x.^2;>> z=x’*y;. Determinekxk2,kxk1, andkxk∞.(b) Letx=12-3(c) LetA=-20000.50001. Determine the operator norm and condition number ofA.