Day4.py

class Person:
        def __init__(self,initialAge):
       		# Add some more code to run some checks on initialAge
            if initialAge < 0:
                print ("Age is not valid, setting age to 0.")
                self.age = 0
            else:
                self.age = initialAge
        def amIOld(self):
            # Do some computations in here and print out the correct statement to the console
            if self.age < 13:
                print("You are young.")
            elif self.age < 18:
                print("You are a teenager.")
            else:
                print("You are old.")
        def yearPasses(self):
            # Increment the age of the person in here
            self.age += 1