Problem 3 (10 points): a)(2 points) Figure 1 illustrates the plots for some data with respect to two variables: balance andemployment status. If you have to select one of these two variables to classify the data into two classes(circle class and plus class), which one would you select? Is there any approach/criterion that you can useto support your selection? Explain your answer.
b)(8 points) For the data in Figure 2 with three variables (X, Y, and Z) and two classes (I and II): which variable you would choose to classify the data? Show all the steps of your calculations and interpret your answer. XYZĈ111I111I