Data linked below -

https://docs.google.com/spreadsheets/d/1GWw1Q0BJIQs03S07zPEdcQhAl36qZzetJMIaeCrOY70/edit?usp=sharing

2. Using the full model (includes all explanatory variables), check to see if there are nonlinearities that exist between MZM and FFUNDS, CPI, and YD. For simplicity, you only need to consider the square, the reciprocal, and the natural logs of FFUNDS, CPI, and YD in your analysis. Provide your final model