When the person expresses a preference on someone else's actions referring to the present or future: Subject + would rather ('d rather) + object + past tense I'd rather you explained to her why we can't go
I THINK they want 4 and it's a case of British lingo. It sounds wrong still. 1 is a repetitive "would." 3. doesn't need the "to." 2. Might be, but I think the past tense is wrong. 4- because it hasn't happened yet. I'd rather you will do it.
This question is AWKWARDLY unhelpful to you. Boooo! 😐
I discovered your question with googling while struggling to understand the question and answer. Although the original questioner got an answer, for people like me, I attached a link that might explain the question well. It's from Cambridge dictionary and relative with the difference between subject. https://dictionary.cambridge.org/grammar/britis...