7. (10 pts) Suppose that for a particular data set, we perform hierarchical clustering using single linkage and using complete linkage. We obtain two dendrograms. (a) (7 pts) At a certain point on the single linkage dendrogram, the clusters {1, 2,3} and {4, 5} fuse. On the complete linkage dendrogram, the clusters {1,2, 3} and {4,5} also fuse at a certain point. Which fusion will occur higher on the tree, or will they fuse at the same height, or is there not enough information to tell? (b) (8 pts) At a certain point on the single linkage dendrogram, the clusters {5} and {6} fuse. On the complete linkage dendrogram, the clusters {5} and {6} also fuse at a certain point. Which fusion will occur higher on the tree, or will they fuse at the same height, or is there not enough information to tell