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.

1. Wearable devices, such as smartwatches and fitness trackers, often incorporate GPS technology for location identification of a person. (Statement 1 is correct) 2. Many wearable devices include sensors (like accelerometers and heart rate monitors) to track movement and physiological signs, enabling sleep monitoring of a person. (Statement 2 is correct) 3. Sophisticated hearing aids are a form of wearable technology specifically designed for assisting the hearing impaired person by amplifying sound. (Statement 3 is correct) 4. Therefore, all three tasks listed are accomplished by wearable devices.