1 Write a Scilab program that generates 4 random column vectors with the length of 1000 samples for each vector. Concatenate the 4 generated column vectors to generate a new column vector with the total length of 4000 samples. Plot the concatenated vector versus the number of samples. Add the appropriate x-label, y-label, title, and legend to your plot. Change the line width to 1 and the line color to red. Save the concatenated vector as a .csv file in the current directory under HW4-Question1. (Hint: you can use the csvWrite (vector name, filename)