Edexcel D1 — Question 5

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
TopicShortest Path

5. This question should be answered on the sheet provided. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{6c6b7934-ab46-4a87-8a11-f99bf9a5d743-05_834_1436_306_280} \captionsetup{labelformat=empty} \caption{Fig. 3}
\end{figure} Figure 3 shows a weighted network. The number on each arc indicates the weight of that arc.
  1. Use Dijkstra's algorithm to find a path of least weight from \(A\) to \(J\) and state the weight of the path. Your solution must show clearly how you have applied the algorithm including:
    1. the order in which the vertices were labelled,
    2. how you determined the path of least weight.
  2. Find if there are any other paths of least weight and explain your answer.
  3. Describe a practical problem that could be modelled by the above network.