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Inheritance Exercises Write a set of classes that could be used to do simple calculations on geometric objects. The set should include the following classes: a) Shapes,containing abstract methods( a methods that is declared without an implementation) area and perimeter b) Rectangle, a subclass of Shape, containing a constructor (with parameters for length and width) along with methods area and perimeter. c) Triangle, a subclass of Shape, containing a constructor (with parameters for the three sides of a triangle) along with methods area (s=(a+b+c)/2, A = sqrt(s(s-a)(s- b)(-))) and perimeter d) Square, a subclass of Rectangle, containing a constructor (with a parameter for the length of a side) and methods that invoke the methods of the Rectangle class to determine the perimeter and area of a square.