Create another Matlab file named Lab5_02.m and use the same brain image as the previous problem. Write the script to load the image and add 'salt and pepper' noise to the image (you choose the level of noise density added). Then filter the image using the "imfilter" built-in function. Use a filter mask of 11X11 to convolve the signal. Afterwards, try one other filter size of your choice and compare filter size to image clarity. Show the different noisy and filtered images.