Fitbits are personal fitness devices which are very popular with the fitness and wanna be fitness target market. The activity trackers are wireless-enabled wearable technology devices that measure personal data such as the number of steps walked, heart rate, quality of sleep, steps climbed, and other personal metrics involved in fitness. Fitbits are sold in several models from the basic entry level one to the more advanced ones which can also measure BMI and blood pressure. Review the section in your textbook which discusses the product life cycle. Please indicate what stage of the product life cycle you think that the personal fitness tracker industry is in, and also the Fitbit itself. Please justify your answer.