nchar() in R

- ### Question 7 (2 points) We will create a knn model of the training data. We will compute a k-nearest neighbour (knn) classification model based on the training data. 1 Load the class library Paste your R code in BOX 1 [Format:a14] '{r} 2 Use the function knn to train a KNN model using the traingdat data and assign the value returned by knn to object knnmodelglass. You will need to specify 4 arguments of the functions. For the k argument, take the square root of the number of rows of traingdat. For the cl argument, use the appropriate training array. [Please use the following format: knn(trainingset, testingset, k=,cl=) with the correct arguments] Paste your R code in BOX 2 [Format:a72] '{r} Print a summary of the predicted values: Paste your R code in BOX 2 [Format:a22] '{r}