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).

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Weight Class Record Holder Country Total Weight 5 Halil MutluTurkey 62 Kim Un-Guk North Korea 327 69 Galain Boevski Bulgaria 77 Lu Xiaojun China 85 Andrei Rybakou Belarus 94 Ilyallyin 105 Andrei Aramnau Belarus 305 357 379 394 Kazakhstan 418 436