If you are referring to a question called Bond, then there isn’t one in the December 2012 exam.
If you are asking about the bonds in the Sigra question, then yes – we calculate the IRR to get the cost of the bond as always with redeemable debt (and has the examiner has done in his answer).
There are lecture on calculating the cost of debt (in the P4 cost of capital lectures) – and in the F9 lectures as well.