Load the Mall Customers data set. Study the plot and the table view to understand what is shown on the plot. Then apply a k-means clustering model and take a look at the inertia elbow plot (attach the plot here). Decide on a suitable number of clusters and create the final model. Also attach the cluster plot of your final model (that also shows the centroids and the Voronoi tesselation). Investigate the clusters: give a brief description of each one, how can we interpret them (which kind of customer do they represent)?