Generate a dataset that represents a sample of 10,000 cars. Assume you have collected information on the price of the car, the mileage, and the age of the car. Think about how the variables may be correlated with each other when you create the dataset (e.g., mileage and age are probably positively related). Describe the variables with describe() and talk about the choices you made to generate a dataset that looks roughly realistic. (This requires some thought.)