Personal Information Class Program Code:

#Create a class name, PersonalData that holds 
#the following personal data: name, address, age, and phone number. 
class PersonalData:
    def __init__(self, name, address, age, phone_number):
        self.__name = name
        self.__address = address
        self.__age = age
        self.__phone_number = phone_number
    #accessor and mutator methods.
    def get_name(self):
        return self.__name
    
    def set_name(self, name):
        self.__name = name
    
    def get_address(self):
        return self.__address
    
    def set_address(self, address):
        self.__address = address
    
    def get_age(self):
        return self.__age
    
    def set_age(self, age):
        self.__age = age
    
    def get_phone_number(self):
        return self.__phone_number
    
    def set_phone_number(self, phone_number):
        self.__phone_number = phone_number

# Creates three instances of the class.
my_info = PersonalData("Charless", "Nyzira", 25, "1234567890")
friend1_info = PersonalData("Josh", "USA", 30, "9876543210")
friend2_info = PersonalData("Kevin", "Canda", 28, "4567891230")

# Access and modify the personal data
print("My Information:")
print("Name:", my_info.get_name())
print("Address:", my_info.get_address())
print("Age:", my_info.get_age())
print("Phone Number:", my_info.get_phone_number())

print("\nFriend 1 Information:")
print("Name:", friend1_info.get_name())
print("Address:", friend1_info.get_address())
print("Age:", friend1_info.get_age())
print("Phone Number:", friend1_info.get_phone_number())

print("\nFriend 2 Information:")
print("Name:", friend2_info.get_name())
print("Address:", friend2_info.get_address())
print("Age:", friend2_info.get_age())
print("Phone Number:", friend2_info.get_phone_number())

# Modify personal data using mutator methods
my_info.set_address("Tokyo")
friend1_info.set_age(32)
friend2_info.set_phone_number("9999999999")

# Display modified personal data
print("\nAfter Modification:")
print("My Information:")
print("Name:", my_info.get_name())
print("Address:", my_info.get_address())
print("Age:", my_info.get_age())
print("Phone Number:", my_info.get_phone_number())

print("\nFriend 1 Information:")
print("Name:", friend1_info.get_name())
print("Address:", friend1_info.get_address())
print("Age:", friend1_info.get_age())
print("Phone Number:", friend1_info.get_phone_number())

print("\nFriend 2 Information:")
print("Name:", friend2_info.get_name())
print("Address:", friend2_info.get_address())
print("Age:", friend2_info.get_age())
print("Phone Number:", friend2_info.get_phone_number())

Executed Output:

My Information:
Name: Charless
Address: Nyzira
Age: 25
Phone Number: 1234567890

Friend 1 Information:
Name: Josh
Address: USA
Age: 30
Phone Number: 9876543210

Friend 2 Information:
Name: Kevin
Address: Canda
Age: 28
Phone Number: 4567891230

After Modification:
My Information:
Name: Charless
Address: Tokyo
Age: 25
Phone Number: 1234567890

Friend 1 Information:
Name: Josh
Address: USA
Age: 32
Phone Number: 9876543210

Friend 2 Information:
Name: Kevin
Address: Canda
Age: 28
Phone Number: 9999999999