Delne what is meant by a "wearable; then (a) identify 3 or 4 wearables"; (b) explain how can our use of them be exploited by businesses who use data analytics (AKA big data); and (c) how might these devices in the future go the way of pay phones, alarm docks, and phone books? For the toolbat, press ALT +F10 (PC) of ALT + FN+F10 (Mac)