Create a linear regression to model 'rating', and interpret the model. Your answer must include a regression model with 'rating' as the 'dependent' variable, and an appropriate number of explanatory variables.

Your answer should include:

- the decision-making process for building your regression model, including explanation of any supporting preliminary analyses required;

- a clear statement of the final model and explanation of what it tells the client about 'rating';

- comment on the performance of the model, overall model fit and the validity of model assumptions.

Note: Please follow the question and answer it, I need my code on Python in Rstudio