(b) An image was taken for inspection. The image was filtered in the frequency domain for further processing; however, an undesired effect resulted as shown in Figure 4 (a). After applying a better filter, the image in Figure 4 (b) was obtained. Examine the figures and answer the following. i) [1 mark] ii) What is the name of the undesired effect? What do you think was the filter applied to the image first? What do you think was the better filter with no such effect? (1 mark] iii) [1 mark] of Figure 4 (a) Figure 4 (b)