Exercise 1: Use Matlab command to obtain the following a) Extract the fourth row of the matrix generated by magic(6) b) Show the results of 'x' multiply by 'y' and 'y' divides by 'x'. Given x = [0:0.1:1.1] and y=[10:21] c) Generate random matrix 'r' of size 4 by 5 with number varying between -8 and 9 Exercise 2: Use MATLAB commands to get exactly as the figure shown below x=pi/2:pi/10:2*pi; y=sin(x); z=cos (x)