第12題Drag and Drop（拖曳題）Add methods to the Beta class to make it compile correctly.class Alpha{public void bar(int... x){}public void bar(int x){}}public class Beta extends Alpha{Place herePlace herePlace here}private void bar(int x){}public void bar(int x){}public int bar(String x){return 1;}public Alpha bar(int x){}public void bar(int x, int y){}public int bar(int x){return x;}