For this assignment we are going to re-design and modify the code for a system to schedule flight crews and aircraft for mean green airlines that we started in homework 2 and homework 3. for this we will need the following entities, plus collections for each of the entities: plane/aircraft, crew member and flight. the data for a plane will contain at least the following: (no change from hw4)make (e. g. boeing)model (eg 737)tail number (eg b171a)number of seats (eg 137)range (e. g. 800 miles)minimum number of cabin crewyou may add other data needed for your implementation as well as you will need accessor and mutator functions for the data. the data for a crew member will contain at least: (this has changed since hw4)

Write a program that displays the following menu: geometry calculator 1. calculate the area of a circle 2. calculate the area of a rectangle 3. calculate the area of a triangle 4. quit enter your choice (1-4): if the user enters 1, the program should ask for the radius of the circle and then display its area. use the following formula: area = ď€(the square of r) use 3.14159 for ď€ and the radius of the circle for r. if the user enters 2, the program should ask for the length and width of the rectangle and then display the rectangle’s area. use the following formula: area = length * width if the user enters 3, the program should ask for the length of the triangle’s base and its height, and then display its area. use the following formula: area = base * height * .5 if the user enters 4, the program should end. input validation: display an error message if the user enters a number outside the range of 1 through 4 when selecting an item from the menu. do not accept negative values for the circle’s radius, the rectangle’s length or width, or the triangle’s base or height. note: if the user enters an improper menu choice (1-4), the program prints "the valid choices are 1 through 4. run the program again and select one of those." if the user enters a negative radius, the program prints "the radius can not be less than zero." if the user enters a negative value for height or base, the program prints "only enter positive values for base and height."