python and JSON please help

Create three python modules.

Create one called Grandfather, one called Father and one called Son.

Each module should contain one method for calculating an Age.

Also include variables for PersonName and PersonDateOfBirth.

Write a python program that imports all three modules and prints out each Person’s name and Age, separately.

Convert each person into JSON and print out the JSON for each Person.

Use Classes to implement a Person class and inherit from that in each module such that you only have to write the Age method once.