B'You are given 2 qubits which are guaranteed to be in one of the four orthogonal states: Your task is to perform necessary operations and measurements to figure out which state it was and to return the index of that state (0 for , 1 for etc.). The state of the qubits after the operations does not matter. You have to implement an operation which takes an array of 2 qubits as an input and returns an integer. Your code should have the following signature: '...