Examine your data in data table 2 and in data table 3. For the data with the smallest percentage differences, compare the total energy at each point. Calculate the sum Uk+Ug at x1 as 1/2kx1^2-mgx1. Calculate the sum at x2 as 1/2 kx2^2. Do you expect them to agree reasonably well? Explain why they should or should not be the same