Eating zongzi on Dragon Boat Festival is a traditional habit of the Chinese nation. On the morning of the fifth day of May, Xiaoli's mother wrapped some opaque zongzi (all zongzi are the same except the stuffing), including two zongzi stuffed with sausage and some zongzi stuffed with mung beans. Now the probability that Xiaoli randomly takes out a sausage-stuffed zongzi is. (1) Find out the number of zongzi with mung bean stuffing in the bag; (2) Xiaoli randomly took out a zongzi for the first time (not putting it back) and took out another zongzi for the second time. Please use the tree diagram or list method to find the probability of Xiaoli getting mung bean dumplings twice.