EXCUSE ME ,,, use this image and solve this questions in MATLAB

i.Add Gaussian noise N( z =0, =10/256) to the image and then apply Salt and Pepper noise with equal probability Pa = Pb = 0.1 to the result. Salt noise makes pixels the brightest and pepper makes pixels the darkest in the image. ii. There are some different approaches to remove noise: a) Applying a 3x3 mean filter. b) Applying a 3x3 median filter c) Applying a 3x3 mean filter at first and then applying a 3x3 median filter. d) Applying a 3x3 median filter at first and then applying a 3x3 mean filter. Implement these approaches and remove noise using them. Show the result of each approach and discuss on results (a short and perfect discussion).

Digital Image Processing