• 1)

    OCR C3 June 2013 – Q1
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    Part (i):

    Part (ii):

  • 2)

    OCR C3 January 2013 – Q5
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    Part (i):

    Part (ii):

  • 3)

    OCR C3 June 2012 – Q4
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    Part (a):

    Part (b):