q$7$:Objective: Plot results Create a function called plot$\_$evolution$($list$\_$years, mean$\_$value$)$ that plots the time evolution of mean$\_$values over the years. The x values should be the years in list$\_$years

and the y values values in mean$\_$values. It should return the plot created, i$.$e$.,$ you must do: plot $=$ plt return plot Example of usage: plot $=$ plot$\_$evolution$([2014,2015,2016,2017,2018],$ mean$\_$values$\_$discount$)$ Note: do not forget to import matplotlib.pyplot Conclusion: When you compared the mean discount to the mean value per dollar sold, you will notice that the discount has increased while the profit per dollar as decreased considerably. Your recommendation was that the discount policy should be reviewed, and you got a promotion!