Answer from cs61c-ed (Cory Benavides 14101530) for Question 2
Routers:  Packet flow control.  Route the packets where they are being used.  If some other device requests data, switch to it.  (Similar to the traffic light example)

Heaters: If it is hot and the heater is on, turn off.  If it is hot and the heater is off, stay off.  If it is cold and the heater is off, turn on.  If it is cold and the heater is on, stay on. (hysteresis)

Anger: If I am mad at my girlfriend, stop.  If I am mad at someone I don't know as well, dwell and grow bitter.  If after being mad at someone else I spend time with my girlfriend, stop being angry.  If I am not mad at someone else, remain in that state.  If I am not mad at my girlfriend, live in peace with her.