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?