Part $($a$)-$ Encapsulation to Protect User Credentials: Implement a User class in C$++$ where the email and password fields are private. Create getter and setter methods to access and modify these private fields. Ensure the setter methods include input validation for the following: $$ Email format: The email should contain an $"$@$"$ symbol and a domain $($e$.$g$.,$ @example.com$).$ Password strength: The password must be at least $8$ characters long, containing: $$ At least one uppercase letter, $$ At least one lowercase letter, $$ At least one special character. Part $($b$)-$ Signup Validation: Implement a signup function in C$++$ that: $$ Prompts the user to enter a valid email and password. $$ Validates the entered email and password based on the rules described in part $($a$).$ Displays appropriate error messages if the email or password is invalid, and prompts the user to re$-$enter their credentials until valid ones are provided. Write a code