I was doing some practice papers for an upcoming test and I was stuck on these particular questions.
First question I was unsure, but for the second question, I have noticed that the ideal wire connecting R1 and R2 creates its own vacuum of parallel circuit. Therefore, from the current divider rule, it doesn't need to account for what happens in R3 and the switch itself. So I believe Q11 is option B.
Any advice on how to approach these two questions would be greatly appreciated.