Problem: Write Python code to build a regression model from the training set that you applied the better solution in (1). Write the code to evaluate its performance on the test set that you applied the better solution in (1) with Root-Mean-Squared-Error (RMSE). RMSE shares similar motivation of the least square loss we taught in the lecture. Section 5 gives reference for the definition. Please try at least two regression models and compare their performances.
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