The following SM chart is to be realized using single-address microprogramming. Show the new SM chart and show the state assignments. The MUX inputs are 1, X_1, X_2, and X_3. Do not invert inputs. Add extra states if necessary. Write the microcode for implementing this state machine using single-address microprogramming. If the given (original) SM chart is implemented using a traditional ROM method, how big a ROM is needed? Explain your calculation