Create a file called basic_classes.py. In that file, write the following classes with appropriate fields and methods. For each class definition, create two example instances of that class, and demonstrate the functionality of at least one of the methods. The class "Circle" with the following attributes: Fields: 1. color (string), and 2. radius (float) Methods: 1. diameter() which calculates the diameter of the circle (you can use math.pi or just 3.14) 2. circumfrence() which calculates the circumference of the circle. 3. isRed() which returns True if this circle is red. The class "Graduate Student" with the following attributes: Fields: 1. first_name (string), 2. last_name (string), 3. year (integer), and 4. major (string) Methods: 1. year_matriculated () which, given that it is January 2020, returns the year that the student began studying. So, if the student's year is 1, then year_matriculated() should return 2019. If their year is 5, then year_matriculated() should return 2015