6) What is the output zl, z2 and z3 of the following program public static void main(String[] args) 4; double x 2.5, zl,22,23; int 21 = meth1(y, x); 22 = meth1 (meth!(x,y), y); z3 = meth!(x+y, y); System.out.println (z1+z2+z3); y = z1 = Z2 = Z3 = public static double meth1 (int a, double b) return (a b); public static double meth1 (double a, int b) return (a b)