18. Perfomm an agglomerative clustering of the following seven points A: ( 10, 0) B: ( 5, 10) C: (10, 11) D: (12, 14) E: (6, 28) F: (25, 7) G: (4, 9) Using the single-link proximity measure. Use Manhattan Distance to measure the dissimilarity between each pair of atomic clusters. Then, use Minimum distance to measure the dissimilarity between the newly-formed cluster and remaining clusters. Which of the following is a cluster at some stage of the agglomeration? a. (A, B, C) b. {C, D, F c. (C, D) d. A,B,C,F)