My guess to (b) is 'yes' but could be wrong !. Console yourself that however intimidating a law question is, you get marks for your reasoning to an answer, even if it turns out that there's case which is directly against you . That can happen. More often, at the advanced level, nobody really knows the answer and then everything is judged on how you approach the question.(After all,like Lord Denning, you might live to discover that the case is wrongly decided and you were right all along!) It's the thought process that matters first; argue like a good lawyer, using what authorities you do have or remember.
But, in the end, the others here [supra ('above') ] are right.Do your own work.