Suppose we discovered two clusters from twelve observations. The analysis variables are x and y. The metric is the Manhattan distance. You are given the following table that shows the observations and their assigned cluster memberships. 2 4 2 4 6 8 6 8 4.5 5.5 5.5 4.5 y 11 11 9 9 11 11 9 9 5.5 5.5 4.5 4.5 cluster 0 0 0 0 0 0 0 0 1 1 1 1 What is the Elbow value for this cluster solution? Hint: the answer is an integer