What is the output of the following program? struct st { int info; struct st *next; }; struct st *list, *ptr; list = new st; list rightarrow info = 20; ptr = new st; ptr rightarrow info = 36; ptr rightarrow next = NULL; list rightarrow next = ptr; ptr = new st; ptr rightarrow info = 40; ptr rightarrow next = list; list = ptr; while (ptr != NULL) { cout