What's the difference between static and non-static methods?Add a getSlope() method to our LineSegment class. Create a Flash Card class. Flash Cards have a Question and an Answer, each of which are Strings. Your class should include a constructor, toString() and equals() methods. Write a main() method that creates an array of three Flash Cards, and prints each of them. Create an address class. Addresses have a street number, a street, a city, state, and zip code. Your class should include a constructor, toString() and equals() methods. Create a Rectangle class. Rectangles have a location, which is the x, y coordinate of its lower left-hand side. They also have a length and width. Include a constructor, accessor and mutator methods, a getArea() method, and equals().