Backpack backpack = new Backpack(); Book book = new Book("The Alchemist", "Paulo Coelho"); backpack.AddItem(book);
Backpack backpack = new Backpack(); Snack snack = new Snack("Granola bar", 150); backpack.AddItem(snack);Here, we create a new backpack and a snack object. We add the snack to the backpack using the `AddItem` method. Package library: It is difficult to determine the specific package library being used for this code as there are likely multiple libraries that have similar functionality.