pete's pizza employs quincy as a delivery driver. pete's guarantees that an order will be delivered within thirty minutes or there is no charge, and insists that its drivers meet the limit. one night, while making a delivery, quincy is caught in a traffic jam. to deliver the pizza within the thirty-minute time limit, quincy drives onto a sidewalk and hits ruth, a pedestrian. is pete's liable to ruth for her injuries? is quincy liable to ruth? why or why not?