a a 4. (40 points) A commercial microwave oven has an embedded system controlling its opera- tion. It has a start button, a cancel/stop button, a button for increasing cooking time by 30 seconds, and a sensor that monitors if the oven door is open or closed. The door needs to be closed for the microwave oven to work. (a) (10 points) Write down the pseudo code that models the behaviors of this system. (b) (15 points) Draw the FSMD diagram for this system. (c) (15 points) Separate the FSMD into FSM and datapath. Make sure the inputs and out- puts of FSM and datapath are clearly marked