Hep with Matlab homework:
---------------------------------------------
Step 1: start your Matlab
Step 2: run the following commend in Matlab 

diary('Lab1.1_1')
diary on

disp('-- Exercise 1.1, problem 1--')

A=[5 -2 1;1 0 4;-3 7 2];

disp('(a) the matrix A=')
A

disp('(b) the second row of A is') 
A(2,:)

disp('(c) (3,2) entry of A is') 
A(3,2)

diary off

Step 3: A file named "Lab1.1_1" is generated in your directory. Print
that file out and turn it in. 
------------------------------------------------

Tip: put all the commends in Step 2 in a file, name it "lab1d1s.m",
     after you tested all the commends, remove the old file Lab1.1_1. 
     And then do the final run with commend "lab1d1s" in Matlab 
     and Print out the file  Lab1.1_1.