1. Given a set of instances in one-dimensional space, {4, 8, 12, 16, 20, 28, 32}, answer the following questions (without using MATLAB or Weka). Form two clusters by applying hierarchical (agglomerative) clustering with single linkage and show the dendrogram. And Apply K-means to create two clusters with the following initial set of centroids: i. c1 = 12, c2 = 30 ii. c1 = 10, c2 = 26 Update centroids in a batch manner. Show both clustering results, evaluate them based on the total sum of (within-cluster) SSE, and take the better one as the solution of K-means. )