Object Oriented Programming - General Questions

What is the output of the following code?

class Base: pass
class Leaf(Base): pass
print(issubclass(Leaf, Base), isinstance(Base(), Leaf))

What is the output of the following code?

class A:
    def who(self): return 'A'
class B:
    def who(self): return 'B'
class C(B, A): pass
print(C().who(), [k.__name__ for k in C.__mro__][:3])

What is the output of the following code?

class T:
    @staticmethod
    def add(a, b):
        return a + b
    @classmethod
    def name(cls):
        return cls.__name__
print(T.add(2, 3), T.name())

What is the output of the following code?

class A:
    def hi(self):
        return 'A'
class B(A):
    def hi(self):
        return 'B' + super().hi()
print(B().hi())

What is the output of the following code?

class A:
    def hello(self):
        return 'A'
class B(A):
    def hello(self):
        return 'B' + super().hello()
print(B().hello())