Conclusion

It needs to be only very short. Look at them yourself to come up with something like this: "The briefing notes indicate that there are particular risks relating to [select just one or two items from answer]. In respect of [... briefest of mentions to what requirement (b) asked for], there are some concerns over [xxxx] which requires further consideration. Finally, ....." At most it contributes to 1 mark of the presentation marks - it should "mirror" the introduction and it hardly matters what you actually say - it can't be "wrong" as long as it is derived from your answer.