2. What is the output displayed by the program below? int i 42; void *thread (void *param) f printf ("%d ", i) ; pthread_exit (42); void *thread2 (void *vargp) ( i=31; int main) pthread t tid, tid2; pthread_create (&tid2, NULL, thread2, NULL) pthread_create (&tid, NULL, thread, NULL) pthread join (tid, (void**) &i); pthread_join(tid2, NULL); printf ("%d ", i) ; return 0