Question: 1. Which matchings in Figure are perfect matchings?
![714_14.png](https://secure.tutorsglobe.com/CMSImages/714_14.png)
2. Find a perfect matching for each graph in Figure, or explain why no perfect matching exists.
3. Examine Figure, which shows three trees. If possible, find a perfect matching in each tree; if not, explain why no perfect matching exists.
![1624_15.jpg](https://secure.tutorsglobe.com/CMSImages/1624_15.jpg)