• 1)

    Edexcel C4 June 2014 – Q7
    View Solution

    Part (a):

    Part (b):

  • 2)

    Edexcel C4 January 2011 – Q6
    View Solution

    Part (a):

    Part (b):

    Part (c):

  • 3)

    Edexcel C4 June 2009 – Q8
    View Solution

    Part (a):

    Part (b):

    Part (c):