A data set provided in "train.txt" contains 100 four-variate observations. Their class assignments are given in the file "train_id.txt". Our goal is to estimate class assignments for observations contained in file "test.txt". 1. Use logistic regression to make a class prediction. 2. Use linear discriminant analysis to make a class prediction. 3. Use quadratic discriminant analysis to make a class prediction. 4. Compare all the obtained results. Then, compare them with the true classification provided in file "test_id.txt". Comment on the classification agreement between your estimated classifications and true one. Discuss your findings