def validate_email(email):
    """
    Validate an email address. Rules:
    - Must contain exactly one '@' symbol
    - Must have at least 1 character before the '@'
    - The part after '@' must contain a '.' with at least 1 char before and after it
    Returns True if valid, False otherwise.
    """
    pass  # TODO: Implement based on the rules above


def validate_password(password):
    """
    Validate a password. Rules:
    - At least 8 characters long
    - Contains at least one uppercase letter
    - Contains at least one lowercase letter
    - Contains at least one digit
    Returns True if valid, False otherwise.
    """
    pass  # TODO: Implement based on the rules above