Modify class Random_number. add variable private int n1; add variable private int n2; add variable private int result; add two constructors method for object creation: first with no arguments, but as result n1 get a value=1; second recieves one variable and set n2. second recieves two variables and gives values for n1 and n2 calculate the result using 3 methods: f1() ,which uses the nextInt() without arguments; f2() nextInt with one bound value f3() nextInt eith two bounds values