3) In class, we have talked conceptually about two cases being "far" away from each other or "close" to each other with regard to the values of their features. A standard method of measuring such distances when the features are numerical in value is through the Euclidean distance, which is explained through the following numerical example: (There is an intermediate step of standardization of the features, the details and importance of which I will explain later in class. We will ignore that step for now) Suppose we have two people whose age, weight and height are: Case 1 2 Age 35 28 Height 67 70 Weight 180 171 The Euclidean distance between the two cases based on these 3 features is defined as 35-28)2+(67-70)+(180-171)=139