Each pixel in a small 3-by-2 image is represented by 2-dimensional feature vector, as shown below: (0.1,0.5) (-0.4, -0.5) (-0.8, -0.9)] ((-0.6, -0.2) (-0.5,0.1) (-0.3, -0.8)] Apply hierarchical agglomerative clustering in order to assign pixels into 4 regions. Assume that (1) the method used to assess similarity is the sum of absolute differences (SAD), and (2) centroid clustering is used to calculate the distance between clusters. ANSWER: Select which of the 6 arrays below shows the correct segmentation. S1 S2 S3 S4 S5 S6 4 2 4. 2 4 4 2 1 4 3 2 4 1 1 4 S1 = S2 = [ A S3 = [ S4= S5 = (1 i 2) s6 = [1 & 1 S6 = 3 3 4 3 3 1 3 3 2 3 1 3 1 1 1 4. 4