$1.[$Basic CPS Concepts$]$ Which items can be considered a cyber$-$physical system? If you do

not think it is CPS$,$ please briefly explain why it is not. If you think it is$,$ please list the essential

features of why it belongs to CPS$,$ i$.$e$.,$ the components that make you consider it CPS$.[50$ pts$]$

a$.$ A smart refrigerator with a built$-$in touchscreen that works with Amazon Alexa monitors

food consumption and notifies the house owner if some food has gone bad.

b$.$ A thermostat that will turn off the air conditioning if the temperature is below $26$

degrees Celsius and turn on if the temperature is above $30$ degrees Celsius.

c$.$ A wristband that can monitor the heartbeat of athletes and send alerts in case of

emergencies.

d$.$ A smart power meter that will automatically report the readings to NOVEC every month

through the Internet.

e$.$ A drone remotely controlled by firefighters in California to monitor forest fires and

stream back videos on the iPhone.

f$.$ A robot cleaner that can plan the route by itself and avoid falling off the stairs with cliff

sensors$.$

g$.$ A solar$-$powered electrical lamp that will be automatically turned on at night.

h$.$ An electrical switch at the home that will cut off the power if the Ampere current is too

large.

i$.$ A supercomputer with $10$K CPU cores.