3. Suppose there is a 3-bit image (L-8) whose size is 8x8 pixels. It has the intensity distribution as the follows: 4 16 4 16 Where rk is the intensity value and nk is the number of pixels with the intensity value r. First please compute this image's normalized histogram. Then, please perform the histogram equalization and give the new intensity distribution after histogram equalization. (20 points)