5. We wll use the mcycle data in the MASS package for this problem. The data set consists of two variables, namely acceleration and measurement times from a simulated motorcycle accident. Our objective is to investigate the relationship between this two variables. Using acceleration as dependent variable and times as covariate, fit your "best" polynomial regression model to describe the relationship between this two variables. Check for the assumptions and justify how you choose the final model. library (MASS) attach(mcycle)