QUESTION 2: [ marks] (a) How does the K-means clustering method differ from hierarchical clustering? [2 marks] (b) Consider the following 4x4 distance matrix computed from observations "1" "2", '3" and "4". [6 marks] A W 1 NAUA D -2 |1 3 3 4 3 O 4 S 4 2 Sketch the dendrogram that results from hierarchically clustering these four observations using complete linkage. Hint: make sure you show the height at which the fusions occur, as well as the observations corresponding to each leaf in the hierarchy and show all relevant working