Answer the following include a one sentence explanation why you chose each answer: Which of these techniques have been used for indoor location

Answer the following include a one sentence explanation why you chose each answer:

Which of these techniques have been used for indoor location tracking?

a Sonar

b UltraWideBand radio

c Radio signal strength (RSSI)

d Computer Vision 

e All of the above

Which wearable sensor would be the least useful for gauging thermal comfort?

a Temperature

b Humidity

c Integrated Activity

d Sound Level

e Light Level

What is the least suitable radio protocol for micropower wearable systems?

a ANT

b 4G LTE or cellular

c WiFi

d BLE (Bluetooth Low Energy)

e NFC (Near-Field Communication)

How does one most precisely determine the location of a fingertip atop a pixellated capacitive sensor array (e.g., on a fingernail)?

a Averaging all voltages

b Taking a position-weighted centroid of capacitive loading across each pixel

c Using the maximum capacitive readout pixel as the coordinate

d Using the pixel that has the maximum time derivative

e Using an accelerometer signal