Discuss whether or not the following devices and processes are open-loop or closed-loop. If they are closed-loop,

Question:

Discuss whether or not the following devices and processes are open-loop or closed-loop. If they are closed-loop, identify the sensing mechanism.
a. A traffic light.
b. A washing machine.
c. A toaster.
d. Cruise control.
e. An aircraft autopilot.
f. Temperature regulation in the human body.