Change Return Program: (Write a python program for the following) The user enters a cost and then the amount of money given. The program will figure out the change and the number of twenty-dollar bills, ten-dollar bills, five-dollar bills, single-dollar bills, quarters, dimes, nickels, pennies needed for the change.  You must have the maximum amount of higher denominations possible before allowing for lower denominations.  For example, If your change is $18.88, You must have One Ten-dollar bill, One Five-dollar bill, Three singles, Three quarters, One dime and three pennies.  There should be no nickels; No three Five-dollar bills etc.

Use C Language Airline Reservation System   A small airline has just purchased a computer for its new automated reservations system. The president has asked you to program the new system. You are to write a program to assign seats on each flight of the airline's only plane (capacity: 10 seats). Your program should display the following menu of alternatives:   Please type 1 for "first class" Please type 2 for "economy"   If the person types 1, then your program should assign a seat in the first class section (seats 1-5). If the person types 2, then your program should assign a seat in the economy section (seats 6-10). Your program should then print a boarding pass indicating the person's seat number and whether it is in the first class or economy section of the plane. Use a single-subscripted array to represent the seating chart of the plane. Initialize all the elements of the array to 0 to indicate that all seats are empty. As each seat is assigned, set the corresponding elements of…

C#: Please help