7. Write a script m-file or mlx-file to do the following: (1) Clear the command window. (2) Load the three output arrays from the single MAT file created in Question 6 back to the workspace. (3) Plot the three trigonometric curves (sine, cosine, and tangent) using proper arrays as x and y created in Question 6. The three trigonometric curves should be plotted in a single plot. (4) Annotate the single plot with proper title, labels, and legends. Save the annotated plot as an image