Develop a landing sequence that gives priority to those aircraft with the highest cost of slack time (excess flying time multiplied by cost per minute of flying time). For example, Flight 616's 18.75 minutes of slack time (22 - 3.25) times $300 per minute means that if Flight 616 does not land until its time is all used up, it incurs an extra flying cost of $5,625. Make a Gantt chart showing the landing sequence and evaluate the sequence in terms of performance. Calculate mean flow time, mean lateness, and average number of planes in the system.