According to Auto News, Uber is set to ______developing self-driving trucks that have been hauling cargo on U.S. _______.Uber is now seeking to focus its autonomous-vehicle technology only on cars.Since its acquisition of Otto in2016, Uber has sought to change _______hauling with self-driving trucks and Uber Freight, the smartphone _______that connects truck drivers and shippers.Transportation experts see trucking as a natural application for self-driving technology because of the relative predictability of highways.