Implement a MeanFilter function to perform a filtering operation on the input image. [Note: the input of the MeanFilter function should be an image array and a mask. The output should be an image array.] Call this function to process the noisy image Circuit by using a 3-by-3 averaging filter and a 5-by-5 averaging filter, respectively. You should not simply use the Matlab “filter2” or “conv2” function in your function implementation. Display original image and two processed images in figure 1 with the appropriate titles