Sketch the tree corresponding to the partition of the predictor space illustrated in the left-hand panel. The number inside the boxes indicate the mean of the response within each region. Create a diagram similar to the left-hand panel, using the tree illustrated in the right-hand panel. You should divide up the predictor space into the correct regions and indicate the mean for each region. Provide a concise written summary (no equations) of the algorithm that we use to fit a regression tree.
