Considering the distance matrix given below, What are the clusters formed after the second iteration of merging elements using single link? a. (A,D),(F,E),(C), and (B) b. (A,F,D),(B,E), and (C) c. (A,F,D),(B),(C), and (E) d. (A,C,D),(B),(E), and (F) What are the clusters formed after the second iteration of merging elements using complete link? a. (A,D,F),(B),(C), and (E) b. (A,D),(B,E), and (C,F) c. (A,D,F),(C), and (B,E) d. (A,D),(E,F),(C), and (B) What is the dendrogram's threshold that make up three clusters in the case of Single-link clustering? a. 20 b. 35 C. 45 d. 10 What is the dendrogram's threshold that make up three clusters in the case of Complete-link clustering? a. 45 b. 20 c. 15 d. 65