(3pts) Suppose now that instead of the oracle calculating the transformation given in the previous problem, the oracle evaluates the function and returns the value f(x) as ∣x⟩∣y⟩→∣x⟩∣y⊕f(x)⟩. Show that the the following circuit is able to determine whether f(x) is constant or balanced with just a single oracle query. The top qubit should be taken as ∣x⟩, and the bottom qubit ∣y⟩.