The accompanying data set contains three predictor variables (x₁, x₂, and x₃) and the target variable (y). Partition the data in the Exercise_9.19_Data worksheet to develop a naïve Bayes classification model where “Y” denotes the positive or success class for y. Score the five new observations on the Exercise_9.19_Score worksheet. 

a. Report the accuracy, sensitivity, and specificity rates for the validation data set. 

b. What is the area under the ROC curve (or AUC value)? 

c. Report the scoring results for the five new observations.