computer vision problem thanks a lot for your help

(a) Show the resulting image obtained after convolution of the below original image with the filter [-1, 0, 1) in the horizontal direction. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1* 1 1 1 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1* 1 1 1* 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (5 marks) (b) Compute gradient magnitude and gradient orientation at pixels (3,4), (5,4) and (5,7) (marked with * in the image) when applying filters (-1,0, 1) and (-1,0, 1] at those points in horizontal and vertical directions respectively