This question is about innovation. Please answer the question around 100 words.

QUESTION 4. Explain how either Uber or Airbnb uses the 'sharing economy business model to disrupt their industry, and the major way(s) this business model is so different from that of the industries (taxis and hotels) they have disrupted? What is the biggest challenge (apart from legal and regulatory challenges) to the shared economy model and why? (hint: this challenge is faced by all companies that use partnerships for outsourcing key functions)