AQA D1 2014 June — Question 2

Exam BoardAQA
ModuleD1 (Decision Mathematics 1)
Year2014
SessionJune
TopicMinimum Spanning Trees

2 A document which is currently written in English is to be translated into six other European Union languages. The cost of translating a document varies, as it is harder to find translators for some languages. The costs, in euros, are shown in the table below.
    1. On the table below, showing the order in which you select the edges, use Prim's algorithm, starting from \(E\), to find a minimum spanning tree for the graph connecting \(D , E , F , G , H , I\) and \(S\).
    2. Find the length of your minimum spanning tree.
    3. Draw your minimum spanning tree.
  1. It is given that the graph has a unique minimum spanning tree. State the final two edges that would be added to complete the minimum spanning tree in the case where:
    1. Prim's algorithm starting from \(H\) is used;
    2. Kruskal's algorithm is used. \begin{table}[h]
      \captionsetup{labelformat=empty} \caption{Answer space for question 2}
      Danish ( \(\boldsymbol { D }\) )English ( \(\boldsymbol { E }\) )French (F)German ( \(G\) )Hungarian (H)Italian (I)Spanish \(\boldsymbol { ( } \boldsymbol { S } \boldsymbol { ) }\)
      Danish (D)-12014080170140140
      English ( \(\boldsymbol { E }\) )120-7080130130110
      French (F)14070-901908590
      German ( \(G\) )808090-110100100
      Hungarian (H)170130190110-140150
      Italian (I)14013085100140-60
      Spanish ( \(\boldsymbol { S }\) )1401109010015060-
      \end{table}