Write only the missing code to make it work:

class Dog: species = "Canis familiaris" def __init__(self, name, age, coat_color): # 1) add the definition of __init__ method

def __str__(self): return f"#2)missing part is #3)missing part years old"

def speak(self, sound): return f"{self.name} says {sound}"

# The value for `age` can vary in your solution philo = Dog("Philo", 5, "brown") print(f"{philo.name}'s coat is {philo.coat_color}.")

python