4. Following is the normalized distance matrix of sales data for four customers of a company. Apply single linkage clustering until only one option remains. Draw a dendogram illustrating the clustering process. What conclusions can you draw from this analysis for this company?

Customer	1	2	3	4
1	0	3.88382	2.08990	2.70886
2		0	3.21080	1.97620
3			0	2.99488
4				0

5. Following are the regression results for a database of home market values in a locality with market value of the house (in dollars) as the dependent variable y and the age of the house (in years) and the size of the house (in square feet) as the two independent x variables.