executive summary on algorithms

Write an executive summary on algorithms that used for (c.1) Gesture Recognition (Non-vision-based), (c.2) Context Recognition based on the light and sound levels in a room based on ambient light sensors and microphones installed in wearable devices, or the location of a user based on GPS sensors, (c.3)   Physical Activity Recognition, (c4)  Emotion Recognition based on heart rate and galvanic skin response sensors.