1):Create a matrix by entering magic(5) on the command line. Export this to a csv file and open with a text editor like Word or Matlab editor (not Excel or notepad). Copy the first row and paste below. 2):Use xlswrite to output magic(5) to an Excel file and open the Excel file. What is the sum of Column A? BTW, there is a way to do this sum in Matlab without a for loop that we will learn when we study Matlab matrices. 3):

Create the following Excel file:

1	2	3
4	5	6
7	8	10

Import it into Matlab using File > Import Data... Ensure Matrix is selected and click the checkbox. Note the name Matlab assigns to your matrix. Change the name to "mymatrix". Execute the command "det(mymatrix)". This finds the determinant of a matrix. We'll talk more about this later - for now just execute the command. What number do you get?