2. Manually implement the Sobel horizontal and vertical edge-detection operations and test the results on several images, including some which have strong edges. Print the original images and images showing the vertical edge map, the horizontal edge map, and the combined edge map, as well as your code and an explanation of how you combined the vertical and horizontal edge maps to get the combined edge map. 3. Using two different test images, add salt-and-pepper noise to each; show the effects of using neighborhood averaging (using 3x3 and 11x1l neighborhoods) to reduce the noise. Comment on the effects of the averaging (both intended and un-intended effects). This particular problem can be performed using either manual or build-in Matlab functions. 2. Manually implement the Sobel horizontal and vertical edge-detection operations and test the results on several images, including some which have strong edges. Print the original images and images showing the vertical edge map, the horizontal edge map, and the combined edge map, as well as your code and an explanation of how you combined the vertical and horizontal edge maps to get the combined edge map. 3. Using two different test images, add salt-and-pepper noise to each; show the effects of using neighborhood averaging (using 3x3 and 11x1l neighborhoods) to reduce the noise. Comment on the effects of the averaging (both intended and un-intended effects). This particular problem can be performed using either manual or build-in Matlab functions