Consider the TopUniversities dataset used in class, which has 25 records. The dendrogram below is generated by the single linkage algorithm in Weka based on the dataset. The subsequent two screens show the k-means clustering results using Weka, where k = 4 and the clusters are labeled from cluster 0 to cluster 3. Answer questions (a), (b) and (c) following the screens.

a. Suppose we would like to obtain 4 clusters using the dendrogram. How many records are contained in each of the 4 clusters?