Quiz 1: I choose to use the ultrasonic sensor and a led as an output. This kind of environmental-friendly combination, because it only lights up when you are really close to the sensor. Thus it will save a lot of electricity.
Quiz 2: In lifestyles I presume. Take automatic faucets as an example, I will put my hands under the faucet no matter if it’s automatic or not. So HCI does make our lives more convenient, that we almost forget how our life actually was before.
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