Letu= (25, $350) correspond to a 25-year old customer that spent $350 at Store A in the previous fiscal year. Letv= (53, $420) correspond to a 53-year old customer that spent $4,100 at Store A in the previous fiscal year.Calculate the dissimilarity between these two observations using Euclidean distance.

a. 66.21

b. 75.39

c. 72.28

d. 88.57

Suppose that the confidence of an association rule is 0.75 and the total number of transactions is 250. How many of those transactions support the consequent if the lift ratio is 1.875?

a. 175

b. 125

c. 150

d. 100