In the context of wearable technology, which of the following tasks is/are accomplished by wearable devices? 1. Location identification of a person 2. Sleep monitoring of a person 3. Assisting the hearing impaired person Select the correct answer using the code given below.

Wearable technology refers to electronic devices that can be worn as accessories, embedded in clothing, implanted in the user's body, or even tattooed on the skin. These devices are designed to collect data about the user or their environment and often communicate with other devices or networks. They are increasingly integrated into daily life and offer various functionalities.

Let's examine the tasks mentioned:

1. Location identification of a person: Many wearable devices, especially smartwatches and fitness trackers, include GPS functionality or can leverage connected smartphones to track and identify a person's location.
2. Sleep monitoring of a person: Fitness trackers and smartwatches are commonly equipped with sensors (accelerometers, heart rate monitors) that can monitor sleep patterns, duration, and quality.
3. Assisting the hearing impaired person: Modern smart hearing aids are advanced wearable devices that not only amplify sound but also use sophisticated digital processing to improve speech clarity, reduce background noise, and can even connect wirelessly to smartphones for calls and streaming audio. All three tasks are commonly accomplished by various types of wearable devices available in the market.