Consider the following Python code:

class Employee:
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary

    def give_raise(self, amount):
        self.salary += amount

If you create an instance of the `Employee` class called john with a salary of 50000 and then call john.give_raise(5000), what will be the updated salary?

In Python, what is the purpose of the __hash__ method in a class?

Consider the following Python code:

class Circle:
    def __init__(self, radius):
        self.radius = radius

    def calculate_circumference(self):
        return 2 * 3.14 * self.radius

If you create an instance of the `Circle` class called small_circle with a radius of 2, what will be the result of calling small_circle.calculate_circumference()?

What does the __repr__ method in Python classes typically represent?

Consider the following Python code:

class Animal:
    def __init__(self, species, legs):
        self.species = species
        self.legs = legs

    def sound(self):
        return "Unknown sound"

If you create an instance of the `Animal` class called dog with species "Dog" and legs 4, what will be the result of calling dog.sound()?