d) What is the result when the following classes are compiled: Explain your answer. class Bird { { System.out.print("b1"); } public Bird() { System.out.print("b2 "); } } class Raptor extends Bird { public Raptor() { System.out.print("r2 "); } } class Hawk { } public Hawk() { } public static void main(String[] args) { System.out.print("pre"); new Hawk(); System.out.println("hawk "); } Raptor h = new Raptor(); (7 marks)