Stuart Rankin, manager of the specialty store All Things Scottish, is interested in devising a way to recommend different types of Scotch whisky to customers based on their preferences among Scotches that they have tried and liked. The file whisky contains data on 69 binary variables over five general whisky attributes (color, nose, body, palate, and finish) for 109 different types of Scotch. Using Jaccard distance to compute dissimilarity between observations, generate the dendrogram resulting from hierarchical clustering with group average linkage to answer the following questions.

a. What is the most similar pair of whiskys?

b. For a customer who likes Glenburgie, which three whiskys should Stuart recommend?

c. Which whisky appears to be the most unusual?