Econo-Flight Airline Reservation Program Due Date: Apr 19 11:59 PM, 2021 Description: The Econo-Airlines fleet consists of one plane with a seating capacity of 12. The aircraft seating is arranged in 6 rows with 2 seats per row. The program uses an array of 12 structures. Each structure holds a seat identification number, a marker that indicates whether the seat is assigned, the last name of the seat holder, and the first name of the seat holder. The program displays the following menu: To choose a function, enter its letter label: Display ALL seat assignments (including Empty). b. Show ONLY a list of empty seats and show total of empty seats SHOW ONLY the assigned seats with name of person and total assigned. d. Assign the customer to an empty seat. Delete ONE seat assignment. f. Delete ALL seat assignments. Quit program The selection must NOT be case sensitive. After exit the program it will save all seat data to a file and when the program is open, it will read the information from the file if the file is existing. e