Exercise 3.2 on page 46. Consider an airport terminal with a number of gates. Planes arrive and depart according to a fixed schedule. Upon arrival a plane has to be assigned to a gate in a way that is convenient for the passengers as well as for the airport personnel. Certain gates are only capable of handling narrowbody planes. Model this problem as a machine scheduling problem. (a) Specify the machines and the processing times. (b) Describe the processing restrictions and constraints, if any. (c) Formulate an appropriate objective function.