Neither answer is correct. At latitude 5ºS, Earth Rate is +1.3º/hour. At latitude 5ºN, Earth Rate is -1.3º/hour. The change is therefore -2.6º/hour.
However, the question apparently exists in the common question bank with incorrect answers. It may be a mistranslation of the meaning of the question from the original French. We have brought it to the attention of the JAA but we do not know whether they have done anything about it.
As for the second problem, the CAA has issued clarification about it by letter, so we know what the authoritative answer is. If your FTO is giving you any other version, it is wrong.
Turn through 90 - indicates nose up and bank angle too low
turn through 180 - indicates nose up and correct bank angle
turn through 270 - indicates nose up and bank angkle too high
on rolling out on original heading - attitude and bank angle are correctly indicated.