The following two questions use the following enum definition. enum Two { case first(A) case second(B)}(4 pts) Write an implementation of the following function which will compile and run, or say if it's impossible to implement. If it's impossible to implement, explain why. func impl4(t1: Two, t2: Two) -> Two { ... }(5 pts) Write an implementation of the following function which will compile and run, or say if it's impossible to implement. If it's impossible to implement, explain why. func impl5(a: A, b: B) -> Two { ... }