Question: 1. In the third sub diagram of Figure, why are there two labels (4,d)?
![1969_33.jpg](https://secure.tutorsglobe.com/CMSImages/1969_33.jpg)
2. In the first list of distances computed by Dijkstra's algorithm, how many tags are present?
3. In the fourth sub diagram of Figure, there are two labels (5, f). Neither is placed on the graph in the following step so why is only one of them left in the list in the fifth sub diagram?