in this code, the integer on each line shows the line number that is not part of code: what is the signature of the method sum: ____ 1 public static int sum(int x, int y){ 2 int z = x +y; 3 return z;...

in this code, the integer on each line shows the line number that is not part of code:
what is the signature of the method sum: ____

  1  public static int sum(int x, int y){

  2     int z = x +y;

  3     return z;

  4 }

   5 public static void main(String[] args){

   6    …

   7      sum(a+2, b);

   8  …

   9 }