Pease write this in MATLAB.....

4. Multiple Plots For the following problem, use a domain of x (0,21] with Ax = TT 20 a) Create a matrix that contains sin(x) on the first row, cos(x) on the second row, and cos(x) sin(x) on the third row. This should generate a size 3x41 matrix. Save the matrix on HW1_14.dat b) Also, plot the 3 rows of the matrix (with three separate plot commands) using index notation. Use the "hold on command to plot all 3 curves on the same figure window. 5. 3D Plotting Create a 3D plot of the following function: f(x,y) = y sin (x) For your domain, use -1