7. Application The following table shows operating cost, seating capacity. and speed for several types of planes. Plane Seats Speed (km/h) Cost (S/h) B747-400 396 538 6859 B747-100 447 520 6447 L-1011-100/200 310 495 3720 DC-10-10 289 500 5281 A300-600 249 473 5237 DC-10-30 265 520 6078 B767-300ER 214 495 3558 8757-200 186 465 2675 B767-200ER 181 488 3348 Source: Data have been extracted from Fathom Dynamic StatisticsTM, Key Curriculum Press. (a) Create an index that calculates the cost to send 100 passengers on a 1000-km trip. (b) Calculate this index for each type of airliner and rank them by increasing cost