Create a C$++$ class named Car with a public attribute model of type string. In the main$()$ function, create an object of the Car class, assign the model name "Honda" to the object, and display the model name using the object.

Write a C$++$ program that defines a class Rectangle with private attributes length and width. The class should have a constructor to initialize these attributes and a public method getArea$()$ to calculate and return the area of the rectangle. Implement a destructor that displays a message when the object is destroyed. In the main$()$ function, create an object of the Rectangle class, initialize it with the values $8$ and $4,$ and use the getArea$()$ method to display the area of the rectangle.

You are tasked with developing a C$++$ program for YOMIE Restaurant that includes a FoodOrder class with item and quantity attributes, a constructor to initialize them, a displayOrder$()$ method to show the food item and its quantity, and in the main$()$ function, create a FoodOrder object for "Matoke" with a quantity of $3,$ then display the order.

Create a C$++$ class named Person with an attribute name $($string$),$ a constructor to initialize it$,$ and a method displayName$()$ to show the name; in the main$()$ function, create a Person object with the name "John" and display it$.$

Write a C$++$ program that demonstrates multiple inheritance using the classes Bull and Cow as base classes, and a Child class named Calf that inherits from both. Include functions in each class to display respective information about the father $($Bull$),$ mother $($Cow$),$ and child $($Calf$).$

Write a C$++$ program that demonstrates polymorphism by defining a base class named Vehicle with a virtual method start$(),$ and two derived classes, Car and Motorcycle, which override the start$()$ method. The program should create pointers of the base class type to call the start$()$ method on objects of the derived classes, illustrating how polymorphism allows for dynamic method resolution.