3. (2 pts) 2D Convolution. In this exercise we will calculate 20 convolutions using the MATLAB function conv2. Consider the following convolution masks, known as 2D Sobel filters: S. = 1 -1 0 1] -2 0 2 | -1 0 1 Sy = 1-1 -2 -11 0 0 0 (1 2 1 (a) (1 pt) Calculate the 2D convolution of mri image with the two filters. Can you guess what each filter is designed to do? (b) (1 pt) What is the relationship between the size of mri image, the Size of the filters in this case, 3x3) and the size of the convolution output Useful MATLAB functions: conv2. Reminder In MATLAB you can use the command help and doc to obtain help about functions