Listed below are the Olympic record men's weight-lifting performances as of 2014.

a) Create a linear model for the Weight Lifted in each Weight Class.
b) Check the residuals plot. Is your linear model appropriate?
c) Create a better model by re-expression Total Weight Lifted and explain how you found it.
d) Explain why you think your new model is better.
e) The record holder of the Unlimited weight class weighs 152 kg. Predict how much he can lift with the models from a) and c).