1) Two kNN models (k = 4 and k = 5) both have the lowest error rate on the validation data set. Which model should be selected? k = 4 k = 5 2) Two kNN models (k = 5 and k = 9) both have the lowest error rate on the validation data set. Which model should be selected? k = 5 k = 9 3) A kNN model has the lowest error rate on the training data set. A 5NN model has the lowest error rate on the validation data set. Which model should be selected? k = 3 k = 5