in python code:

We call a Pythagorean triplet, a triplet of integers (x, y, z) not null satisfying the relation x +y? = z? 1- Write a function that takes three arguments and returns if the numbers are a Pythagorean triplet or not. 2- Write a program allowing the using to input three values and checks if they are a Pythagorean triplet. 3- Write a function, that takes as arguments a number n, and returns the list of all Pythagorean triplets where x, y and z are all less than n.