In order to perform KNN analysis on pima dataset from mass library in r, we need to separate the X-variables and the y-labels. (Which should be our y-variable?) Before we separate them out, create vector/array of 1 and 2 to create train-test split in the ratio of 3:1. (Set a constant seed value so that we can duplicate the results.) So eventually, you will get the training Xs as a dataframe, training y-label (a vector), as well as the test sets together in four groups. Make sure the train-X and train-y are not mixed up in the ordering during the process. Same for test-X and test-y.

**KNN results**

Perform the KNN analysis on pima dataset from mass library in r, with different k values. You do not need to show all the results from different k, but please include the one with the best (total) accuracy in your submission. How does the accuracy compared to the percentages of being T/F in the dataset?