Consider the following database. RecordAgeYears of Service1305250253501542555301065525 Perform a single linkage hierarchical clustering for the 6 records. Hint: Develop a distance matrix of the 6 records using Euclidean distance first, rounding to 1 decimal place. Then, run the single linkage clustering algorithm. Apply elbow method (plotting the number of clusters versus within cluster sum of squares) to identify the right k-value for the clustering result in part a. Briefly discuss your answer. Calculation steps are not required in part b. Use Excel to assist you in calculating centroid values and WCSS values.