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:

Statement 1 is correct. Wearable devices can perform several tasks, and out of given options, all three are achievable.
Many smartwatches and wearables with GPS functionality can track a person's location. This can be helpful for navigation, fitness tracking, or safety purposes. Statement 2 is correct. Wearable sleep trackers can monitor sleep patterns, including sleep duration, sleep stages (deep sleep, light sleep, REM sleep), and sleep quality. Statement 3 is correct. Some wearables can function as hearing aids, amplifying sounds and improving hearing for people with hearing loss. Therefore, the correct answer is 1, 2, and 3.