Explain what this function does clearly. You need to give the purpose of the function in a single sentence and then give a one paragraph explanation of the code. . 8 9 1 void function(Node root) 2.1 3 int y - 0, X-; 3 4 Node ptr - root; * 5- while (ptr - NULL) { 6 7 if (ptr->data x 2 -- ) 8 x + ptr->data; 9 19 else 11 y += ptr->data; 12 13 ptr = ptr->next; 14 } 15 16 cout