Import the iris data set from the datasets package and take a look at the columns. We would like to visualize the K

$-$nearest neighbor method in two dimensions, so make a data set called iris$2$ consisting of the columns relating to Sepal Width, Petal Width, and Species.

Create a data set train consisting of $60\%$ of the data in iris$2$ and test consisting of the remaining $40\%$ of the data. IMPORTANT: Make sure that each species is represented proportionally in the training set!