Let A be a Mealy machine. Which of the following transformations, if any, yield a Moore machine? Explain. 1) Adding a D flip-flop to each output (the outputs of the new flip-flops will be the new outputs of the machine). 2) Adding a D flip-flop to each input (the outputs of the new flip-flops will be the new inputs of the machine). 3) Substituting each flip-flops by two flip-flops, such that the output of the first is connected to the input of the second (the second flip-flop is a D flip-flop).