<image>An oil tanker received instructions to refuel a nearby transport aircraft. The remaining fuel in the oil tank is Q_{1} (tons), and the remaining fuel in the transport aircraft is Q_{2} (tons). The refueling time is t minutes. The graphs of the functional relationships between Q_{1}, Q_{2}, and time t are shown in the figure. If the transport aircraft continues to fly at its original speed after refueling, it will take 11 hours to reach its destination. Is the transport aircraft's fuel sufficient for the journey? 
