4. You are responsible person for fleet planning of your airlines. You will do fleet planning for flight leg which includes flights between stanbul (IST) - Montreal (YUL) via Munich (MUC). Number of passengers (demand) and average fare for each flight itinerary were tabulated as below: You have two different types of aircraft. Their capacities are different. Type A has 160 seats and Type B has 200 seats. The operating costs of each type of aircraft were given in the following table. Please consider all possible fleet alternatives. Your objective is to have minimum spill costs. Please analyze and decide the following two scenarios which combination of fleet provides more contribution to our revenue. - Scenairo-1, use Type A for itinerary-1 and use Type B for itinerary-2 - Scenairo-2 uses Type B's for both itineraries. Which scenario do you prefer? \& why? (25 points)